The Chofetz Chaim was once traveling by train to a Jewish community to give a lecture. A man sat down next to him during the trip and started a conversation. When the Chofetz Chaim asked where he was heading, the man replied, "I'm going into town to hear the Chofetz Chaim speak. He's the greatest tzaddik (righteous person) in the Jewish world today." Embarrassed by what he was hearing, the Chofetz Chaim told the man, "People exaggerate about his greatness. I know him very well and he's not that great." The man became infuriated by what he was hearing and slapped the Chofetz Chaim in the face. That night, the man was horrified when he came to the lecture and realized that the person he hit was actually the Chofetz Chaim. As soon as the lecture was over, the man pleaded for forgiveness. The Chofetz Chaim smiled and said, "There's no need for forgiveness - you were defending me. In fact, you taught me a great lesson: my whole life I've been teaching people not to defame others; now I've learned that it's also wrong to defame yourself."
(יד) הוּא הָיָה אוֹמֵר, אִם אֵין אֲנִי לִי, מִי לִי. וּכְשֶׁאֲנִי לְעַצְמִי, מָה אֲנִי. וְאִם לֹא עַכְשָׁיו, אֵימָתָי:
(14) He [also] used to say: If I am not for myself, who is for me? But if I am for my own self [only], what am I? And if not now, when?
(א) [קנד] כשם שצריך אדם להאמין בהש"י כך צריך אח"כ להאמין בעצמו. ר"ל שיש להש"י עסק עמו ושאיננו פועל בטל שבין לילה כו' וכחיתו שדה שלאחר מיתתם נאבדו ואינם. רק צריך להאמין כי נפשו ממקור החיים ית"ש והש"י מתענג ומשתעשע בה כשעושת רצונו.
(1) Just as person is required to believe in God, so too is he afterwards required to believe in himself. I mean to say that [one must believe] that God has dealings with him, and that he is not a creation of God which is 'only for today, etc.,' an like 'an animal of the field' that after their death are gone and no longer. Rather one must believe that God, may He be blessed, delights and revels in his doing His will.
לְפִיכָךְ נִבְרָא אָדָם יְחִידִי, לְלַמֶּדְךָ, שֶׁכָּל הַמְאַבֵּד נֶפֶשׁ אַחַת מִיִּשְׂרָאֵל, מַעֲלֶה עָלָיו הַכָּתוּב כְּאִלּוּ אִבֵּד עוֹלָם מָלֵא. וְכָל הַמְקַיֵּם נֶפֶשׁ אַחַת מִיִּשְׂרָאֵל, מַעֲלֶה עָלָיו הַכָּתוּב כְּאִלּוּ קִיֵּם עוֹלָם מָלֵא. לְפִיכָךְ כָּל אֶחָד וְאֶחָד חַיָּב לוֹמַר, בִּשְׁבִילִי נִבְרָא הָעוֹלָם.
It was for this reason that man was first created as one person [Adam], to teach you that anyone who destroys a life is considered by Scripture to have destroyed an entire world; and anyone who saves a life is as if he saved an entire world....Therefore, every person must say, “For my sake the world was created.”
Rabbi Simcha Bunim teaches: Every person should have two pockets. In one pocket should be a piece of paper saying: "I am only dust and ashes." When one is feeling too proud, reach into this pocket and take out this paper and read it. In the other pocket should be a piece of paper saying: "For my sake was the world created." When one is feeling disheartened and lowly, reach into this pocket and take this paper out and read it.
בשבילי נברא העולם - כלו' חשוב אני כעולם מלא לא אטרד א"ע מן העול' בעביר' אחת וימשוך ממנה:
לֹֽא־תִקֹּ֤ם וְלֹֽא־תִטֹּר֙ אֶת־בְּנֵ֣י עַמֶּ֔ךָ וְאָֽהַבְתָּ֥ לְרֵעֲךָ֖ כָּמ֑וֹךָ אֲנִ֖י יהוה׃
You shall not take revenge [e.g., "You did not lend me; I will not lend you!"], and you shall not bear a grudge against the children of your people [e.g.. "I am not like you who did not lend me; I shall lend you!"]. And you shall love your neighbor as yourself. [(R. Akiva said: This is an all-embracing principle in Torah)]; I am the L-rd.
וְשָׁ֣ם רָאִ֗ינוּ אֶת־הַנְּפִילִ֛ים בְּנֵ֥י עֲנָ֖ק מִן־הַנְּפִלִ֑ים וַנְּהִ֤י בְעֵינֵ֙ינוּ֙ כַּֽחֲגָבִ֔ים וְכֵ֥ן הָיִ֖ינוּ בְּעֵינֵיהֶֽם׃
we saw the Nephilim there—the Anakites are part of the Nephilim—and we looked like grasshoppers to ourselves, and so we must have looked to them.”
ורבי יוחנן האי וחי אחיך עמך מאי עביד ליה מבעי ליה לכדתניא שנים שהיו מהלכין בדרך וביד אחד מהן קיתון של מים אם שותין שניהם מתים ואם שותה אחד מהן מגיע לישוב דרש בן פטורא מוטב שישתו שניהם וימותו ואל יראה אחד מהם במיתתו של חבירו עד שבא ר' עקיבא ולימד וחי אחיך עמך חייך קודמים לחיי חבירך
The Gemara asks: And Rabbi Yoḥanan, what does he do with this verse: “And your brother shall live with you”? The Gemara answers: He requires the verse for that which is taught in a baraita: If two people were walking on a desolate path and there was a jug [kiton] of water in the possession of one of them, and the situation was such that if both drink from the jug, both will die, as there is not enough water, but if only one of them drinks, he will reach a settled area, there is a dispute as to the halakha. Ben Petora taught: It is preferable that both of them drink and die, and let neither one of them see the death of the other. This was the accepted opinion until Rabbi Akiva came and taught that the verse states: “And your brother shall live with you,” indicating that your life takes precedence over the life of the other.
What's the harm in giving too much of yourself?
אָמַר רַבִּי אִילְעָא, בְּאוּשָׁא הִתְקִינוּ: הַמְבַזְבֵּז — אַל יְבַזְבֵּז יוֹתֵר מֵחוֹמֶשׁ. תַּנְיָא נָמֵי הָכִי: הַמְבַזְבֵּז — אַל יְבַזְבֵּז יוֹתֵר מֵחוֹמֶשׁ, שֶׁמָּא יִצְטָרֵךְ לַבְּרִיּוֹת. וּמַעֲשֶׂה בְּאֶחָד שֶׁבִּקֵּשׁ לְבַזְבֵּז [יוֹתֵר מֵחוֹמֶשׁ], וְלֹא הִנִּיחַ לוֹ חֲבֵירוֹ. וּמַנּוּ — רַבִּי יְשֵׁבָב. וְאָמְרִי לַהּ: רַבִּי יְשֵׁבָב, וְלֹא הִנִּיחוֹ חֲבֵירוֹ, וּמַנּוּ — רַבִּי עֲקִיבָא.
§ Apropos the ordinances instituted by the Sages in Usha, the Gemara cites another one. Rabbi Ile’a said: In Usha the Sages instituted that one who dispenses his money to charity should not dispense more than one-fifth. That opinion is also taught in a baraita: One who scatters should not scatter more than one-fifth, lest he render himself destitute and need the help of other people. And an incident occurred involving a certain individual who sought to dispense more than one-fifth of his property as charity, and his friend did not let him act upon his wishes. And who was this friend? Rabbi Yeshevav. And some say that Rabbi Yeshevav was the one who wanted to give too much charity, and his friend did not let him do so, and who was the friend? Rabbi Akiva.
רַבִּי יוֹסֵי אוֹמֵר: אֵין הַיָּחִיד רַשַּׁאי לְסַגֵּף אֶת עַצְמוֹ בְּתַעֲנִית, שֶׁמָּא יִצְטָרֵךְ לַבְּרִיּוֹת וְאֵין הַבְּרִיּוֹת מְרַחֲמוֹת עָלָיו. אָמַר רַב יְהוּדָה אָמַר רַב: מַאי טַעְמָא דְּרַבִּי יוֹסֵי — דִּכְתִיב: ״וַיְהִי הָאָדָם לְנֶפֶשׁ חַיָּה״ — נְשָׁמָה שֶׁנָּתַתִּי בְּךָ הַחְיֵיה.
Rabbi Yosei says: An individual is not permitted to afflict himself by fasting, lest he become too weak to work and be beholden to other beings, and those beings will not have mercy on him. Rav Yehuda said that Rav said: What is the reason of Rabbi Yosei? It is as it is written: “And man became a living soul” (Genesis 2:7). Rabbi Yosei interprets this verse as a command: The soul I placed within you, preserve and sustain it.