(ג) דבר אחר: וכי ימוך, הדא הוא דכתיב (שם יא): גומל נפשו איש חסד, זה הלל הזקן שבשעה שהיה נפטר מתלמידיו היה מהלך והולך עמם. אמרו לו תלמידיו: רבי, להיכן אתה הולך? אמר להם: לעשות מצוה! אמרו לו: וכי מה מצוה זו? אמר להן: לרחוץ בבית המרחץ. אמרו לו: וכי זו מצוה היא? אמר להם: הן. מה אם איקונין של מלכים שמעמידים אותו בבתי טרטיאות ובבתי קרקסיאות, מי שנתמנה עליהם הוא מורקן ושוטפן והן מעלין לו מזונות. ולא עוד, אלא שהוא מתגדל עם גדולי מלכות. אני שנבראתי בצלם ובדמות, דכתיב (בראשית ב): כי בצלם אלהים עשה את האדם עאכ"ו!

A story is told of Hillel that when he finished a lesson with his pupils, he accompanied them from the classroom. They said, "Master, where are you going?" He answered, "To perform a mitzvah." "Which mitzvah is that?" they asked. "To bathe in a bathhouse," replied Hillel. The students asked, "Is this a mitzvah?" Hillel replied, "If somebody is appointed to scrape and clean the statues of the king that are set up in the theaters and circuses and is paid to do the work, and furthermore, associates with the nobility, how much the more so should I, who am created in the divine image and likeness, take care of my body."

(לה) לֹא־תַעֲשׂ֥וּ עָ֖וֶל בַּמִּשְׁפָּ֑ט בַּמִּדָּ֕ה בַּמִּשְׁקָ֖ל וּבַמְּשׂוּרָֽה׃ (לו) מֹ֧אזְנֵי צֶ֣דֶק אַבְנֵי־צֶ֗דֶק אֵ֥יפַת צֶ֛דֶק וְהִ֥ין צֶ֖דֶק יִהְיֶ֣ה לָכֶ֑ם אֲנִי֙ יְהוָ֣ה אֱלֹֽהֵיכֶ֔ם אֲשֶׁר־הוֹצֵ֥אתִי אֶתְכֶ֖ם מֵאֶ֥רֶץ מִצְרָֽיִם׃

(35) You shall not falsify measures of length, weight or capacity. (36) You shall have an honest balance, honest weights, an honest ephah, and an honest hin. I am the Lord your God, who brought you out of the land of Egypt.

Mishneh Torah, Human Dispositions 4:1

(1) Since a healthy and whole body is necessary for the ways of G-D (for it is impossible to imply or know anything of Godly wisdom when one is sick), therefore one must distance himself from things that are damaging to the body and to accustom oneself to things that strengthen and make one healthy. They are as follows: a person should only eat when he is hungry, and drink when he is thirsty.

השלום יש שלום לכם בבריאת הגוף כי אמנם הבריאות יהיה בשלום ההפכים וזה כשלא יתקומם אחד מההפכים על הפכו:
השלום? is he well (healthy) in body? Physical health consists of opposite forces in the body being in perfect balance with one another. [hence the word שלום, “being at peace, being in perfect harmony,” is an acceptable word for describing physical health. Ed.]

Notes from Rabbi Yochanan Twersky (the Tolner Rebbe)

“It was his custom to do cartwheels/flips at certain moments. He had a fixed time to do it every night, before all holy ritual acts like Kiddush, before lighting Chanukah candles and such, before reading a particularly difficult kvitel [letters of request for assistance from congregants], in order to gladden the bride and groom at a wedding. He would do this as a form of self-erasure (bitul ha-yesh) Sometimes he would explain himself in words of rebirth and renewal, a nullification of the past and open reception for the future.

(א) הוֹאִיל וֶהֱיוֹת הַגּוּף בָּרִיא וְשָׁלֵם מִדַּרְכֵי הַשֵּׁם הוּא. שֶׁהֲרֵי אִי אֶפְשָׁר שֶׁיָּבִין אוֹ יֵדַע דָּבָר מִידִיעַת הַבּוֹרֵא וְהוּא חוֹלֶה. לְפִיכָךְ צָרִיךְ לְהַרְחִיק אָדָם עַצְמוֹ מִדְּבָרִים הַמְאַבְּדִין אֶת הַגּוּף. וּלְהַנְהִיג עַצְמוֹ בִּדְבָרִים הַמַּבְרִין וְהַמַּחֲלִימִים. וְאֵלּוּ הֵן: לְעוֹלָם לֹא יֹאכַל אָדָם אֶלָּא כְּשֶׁהוּא רָעֵב. וְלֹא יִשְׁתֶּה אֶלָּא כְּשֶׁהוּא צָמֵא. וְאַל יַשְׁהֵא נְקָבָיו אֲפִלּוּ רֶגַע אֶחָד. אֶלָּא כָּל זְמַן שֶׁצָּרִיךְ לְהַשְׁתִּין אוֹ לְהָסֵךְ אֶת רַגְלָיו יַעֲמֹד מִיָּד:

(1) Since a healthy and whole body is necessary for the ways of G-D (for it is impossible to imply or know anything of Godly wisdom when one is sick), therefore one must distance himself from things that are damaging to the body and to accustom oneself to things that strengthen and make one healthy. They are as follows: a person should only eat when he is hungry, and drink when he is thirsty, ...

בָּרוּךְ אַתָּה יְהֹוָה אֱלֹהֵינוּ מֶלֶךְ הָעוֹלָם אֲשֶׁר יָצַר אֶת הָאָדָם בְּחָכְמָה וּבָרָא בוֹ נְקָבִים נְקָבִים חֲלוּלִים חֲלוּלִים. גָּלוּי וְיָדוּעַ לִפְנֵי כִסֵּא כְבוֹדֶךָ שֶׁאִם יִפָּתֵחַ אֶחָד מֵהֶם אוֹ יִסָּתֵם אֶחָד מֵהֶם אִי אֶפְשַׁר לְהִתְקַיֵּם וְלַעֲמוֹד לְפָנֶיךָ. בָּרוּךְ אַתָּה יְהֹוָה רוֹפֵא כָל בָּשָׂר וּמַפְלִיא לַעֲשֹוֹת.
Blessed are You, God, our God, sovereign of the universe, who formed humans with wisdom and created within him many openings and many hollows. It is obvious in the presence of your glorious throne that if one of them were ruptured, or if one of them were blocked, it would be impossible to exist and stand in your presence. Blessed are You, God, who heals all flesh and performs wonders. [translation by Hazon]
ד"ה צדק צדק: כשתתן לך שופטים, אתה, הממנה את השופטים, בחר את היותר שופטי צדק, אף על פי שאין בהם כל כך שאר תכסיסים הראויים לדיין כמו שלמות הקנין ושלמות הגוף. כענין: אל תבט אל מראהו ואל גבה קומתו.
צדק צדק תרדוף. When you are about to put this legislation into practice, the party in charge of appointing such judges is told by Moses to select only those who are already known for their sense of fair play and righteousness. He will have to look for such people all over the tribe. If potential judges do not have all the qualifications which are desirable in a judge, this qualification of fairness is the overriding quality all must possess. This is what the prophet Samuel was told by G’d when he had to look for a replacement of King Sha-ul among the sons of Yishai. (Samuel I 16,7) He was specifically told to ignore external appearances.
BabylonianTalmud, Sanhedrin 32b
כדתניא: צדק צדק תרדף - אחד לדין ואחד לפשרה. כיצד? שתי ספינות עוברות בנהר ופגעו זה בזה, אם עוברות שתיהן - שתיהן טובעות, בזה אחר זה - שתיהן עוברות. וכן שני גמלים שהיו עולים במעלות בית חורון ופגעו זה בזה, אם עלו שניהן - שניהן נופלין, בזה אחר זה - שניהן עולין. הא כיצד? טעונה ושאינה טעונה - תידחה שאינה טעונה מפני טעונה. קרובה ושאינה קרובה - תידחה קרובה מפני שאינה קרובה. היו שתיהן קרובות, שתיהן רחוקות - הטל פשרה ביניהן, ומעלות שכר זו לזו.
It has been taught: Justice, justice shall you follow; the first [mention of justice] refers to a decision based on strict law; the second, to a compromise. How so? Where two boats sailing on a river meet; If both attempt to pass simultaneously, both will sink, whereas, if one makes way for the other, both can pass [without mishap]. Likewise, if two camels met each other while on the ascent to Beth-Horon; if they both ascend [at the same time] both may tumble down [into the valley]; but if [they ascend] after each other, both can go up [safely]. How then should they act? If one is laden and the other unladen, the latter should give way to the former. If one is nearer [to its destination] than the other, the former should give way to the latter. If both are [equally] near or far [from their destination,] make a compromise between them, the one [which is to go forward] compensating the other [which has to give way]. [Soncino translation]
יומא חד הוה קא סחי ר' יוחנן בירדנא חזייה ריש לקיש ושוור לירדנא אבתריה אמר ליה חילך לאורייתא אמר ליה שופרך לנשי א"ל אי הדרת בך יהיבנא לך אחותי דשפירא מינאי קביל עליה בעי למיהדר לאתויי מאניה ולא מצי הדר
The Gemara relates: One day, Rabbi Yoḥanan was bathing in the Jordan River. Reish Lakish saw him and jumped into the Jordan, pursuing him. At that time, Reish Lakish was the leader of a band of marauders. Rabbi Yoḥanan said to Reish Lakish: Your strength is fit for Torah study. Reish Lakish said to him: Your beauty is fit for women. Rabbi Yoḥanan said to him: If you return to the pursuit of Torah, I will give you my sister in marriage, who is more beautiful than I am. Reish Lakish accepted upon himself to study Torah. Subsequently, Reish Lakish wanted to jump back out of the river to bring back his clothes, but he was unable to return, as he had lost his physical strength as soon as he accepted the responsibility to study Torah upon himself.
תנו רבנן ההולך לאיצטדינין ולכרקום וראה שם את הנחשים ואת החברין בוקיון ומוקיון ומוליון ולוליון בלורין סלגורין הרי זה מושב לצים ועליהם הכתוב אומר (תהלים א, א) אשרי האיש אשר לא הלך וגו' כי אם בתורת ה' חפצו הא למדת. שדברים הללו מביאין את האדם לידי ביטול תורה ורמינהי [הולכין] לאיצטדינין מותר מפני שצווח ומציל ולכרקום מותר מפני ישוב מדינה ובלבד שלא יתחשב עמהם ואם נתחשב עמהם אסור קשיא איצטדינין אאיצטדינין קשיא כרקום אכרקום
§ The Sages taught: With regard to one who goes to stadiums [le’itztadinin] where people are killed in contests with gladiators or beasts, or to a camp of besiegers [ulkharkom] where different forms of entertainment are provided for the besieging army, and he sees there the acts of the diviners and those who cast spells, or the acts of the clowns known as bukiyon, or mukiyon, or muliyon, or luliyon, or belurin, or salgurin, this is categorized as “the seat of the scornful”; and with regard to such places the verse states: “Happy is the man that has not walked in the council of the wicked, nor stood in the way of sinners, nor sat in the seat of the scornful. But his delight is in the Torah of the Lord” (Psalms 1:1–2). You learn from here that these matters bring a person to dereliction of the study of Torah, since had he not sat in “the seat of the scornful,” he would delight in the study of Torah. And the Gemara raises a contradiction from another baraita: One is permitted to go to stadiums, because he can scream and save the life of a Jew who would otherwise be killed there; and it is permitted to go to a camp of besiegers, because at times one can provide for the public welfare by petitioning the besiegers and saving the residents of the town, provided that he is not counted as one of them; but if he is counted as one of them, it is prohibited. This is difficult, as there is a contradiction between the statement about attending stadiums in the first baraita and the statement about attending stadiums in the second baraita, and is similarly difficult as there is a contradiction between the statement about a camp of besiegers in the first baraita and the statement about a camp of besiegers in the second baraita.
תנו רבנן אין הולכין לטרטיאות ולקרקסיאות מפני שמזבלין שם זיבול לעבודת כוכבים דברי ר' מאיר וחכמים אומרים מקום שמזבלין אסור מפני חשד עבודת כוכבים ומקום שאין מזבלין שם אסור מפני מושב לצים
The Sages taught: One may not go to theaters [letarteiot] or circuses [ulkirkaseiot] because they sacrifice offerings there to objects of idol worship; this is the statement of Rabbi Meir. And the Rabbis say: It is prohibited to go to a place where they sacrifice offerings, due to a suspicion of idol worship, and it is also prohibited to go to a place where they do not sacrifice offerings, due to it being considered “the seat of the scornful.”
אמר רבי אליעזר קשה היא שתחילת' יסורין וסופו כלייה דרש ר' שמעון בן פזי אשרי האיש אשר לא הלך לטרטיאות ולקרקסיאות של עובדי כוכבים ובדרך חטאים לא עמד זה שלא עמד בקנגיון ובמושב לצים לא ישב שלא ישב בתחבולות שמא יאמר אדם הואיל ולא הלכתי לטרטיאות ולקרקסיאות ולא עמדתי בקנגיון אלך ואתגרה בשינה ת"ל ובתורתו יהגה יומם ולילה
Rabbi Eliezer says: Scoffing is a severe sin, as at first one is punished with suffering, and ultimately one is punished with extermination. Rabbi Shimon ben Pazi taught: “Happy is the man that has not walked in the counsel of the wicked,” this is referring to the theaters and circuses of gentiles; “nor stood in the way of sinners,” this is referring to one who has not stood as an observer at bestial contests [bekinigiyyon]; “nor sat in the seat of the scornful,” this is referring to one who has not sat in the bad company of people who engage in scoffing and jeering. Lest a person say: Since I did not go to theaters and circuses, and did not stand in bestial contests, I will go and indulge in sleep, the verse states: “And he meditates in His law day and night” (Psalms 1:2). This demonstrates that it is not sufficient simply to avoid transgressions; rather, it is necessary to engage actively in Torah study.
(טו) וְנִשְׁמַרְתֶּ֥ם מְאֹ֖ד לְנַפְשֹׁתֵיכֶ֑ם כִּ֣י לֹ֤א רְאִיתֶם֙ כׇּל־תְּמוּנָ֔ה בְּי֗וֹם דִּבֶּ֨ר יְהֹוָ֧ה אֲלֵיכֶ֛ם בְּחֹרֵ֖ב מִתּ֥וֹךְ הָאֵֽשׁ׃
(15) For your own sake, therefore, be most careful—since you saw no shape when the LORD your God spoke to you at Horeb out of the fire—
(יז) גֹּמֵ֣ל נַ֭פְשׁוֹ אִ֣ישׁ חָ֑סֶד וְעֹכֵ֥ר שְׁ֝אֵר֗וֹ אַכְזָרִֽי׃
(17) A kindly man benefits himself; A cruel man makes trouble for himself.

Jerusalem Talmud, Kiddushin

In the world to come, a person will be asked to give an account for that which, being excellent to eat, she gazed at and did not eat.