Purim: Not Just for Kids
(ז) וַיְהִ֨י אֹמֵ֜ן אֶת־הֲדַסָּ֗ה הִ֤יא אֶסְתֵּר֙ בַּת־דֹּד֔וֹ כִּ֛י אֵ֥ין לָ֖הּ אָ֣ב וָאֵ֑ם וְהַנַּעֲרָ֤ה יְפַת־תֹּ֙אַר֙ וְטוֹבַ֣ת מַרְאֶ֔ה וּבְמ֤וֹת אָבִ֙יהָ֙ וְאִמָּ֔הּ לְקָחָ֧הּ מָרְדֳּכַ֛י ל֖וֹ לְבַֽת׃
(7) And he brought up Hadassah, that is, Esther, his uncle’s daughter; for she had neither father nor mother, and the maiden was of beautiful form and fair to look on; and when her father and mother were dead, Mordecai took her for his own daughter.
ובמות אביה ואמה לקחה מרדכי לו לבת תנא משום ר"מ אל תקרי לבת אלא לבית וכן הוא אומר (שמואל ב יב, ג) ולרש אין כל כי אם כבשה אחת קטנה אשר קנה ויחיה ותגדל עמו ועם בניו יחדו מפתו תאכל ומכוסו תשתה ובחיקו תשכב ותהי לו כבת משום דבחיקו תשכב הוות ליה (לבת) אלא (לבית) הכי נמי לבית
"And when her father and mother died, Mordechai took her as his own daughter." It was taught in the name of Rabbi Meir: Do not read 'for a daughter'. Rather, [read] 'for a [member of his] household' (i.e., wife). And thus it says (II Samuel 12:3) "And the poor man had nothing but one small ewe-lamb which he had bought and nurtured; she grew up together with him and his children, she ate from his bread and she drank from his cup, she lay down in his bosom and was like a daughter to him." Because she would lie in his bosom, was she (like a daughter) to him? Rather (like a house/wife). Also here, 'like a house/wife'.
(יז) וַיֶּאֱהַ֨ב הַמֶּ֤לֶךְ אֶת־אֶסְתֵּר֙ מִכָּל־הַנָּשִׁ֔ים וַתִּשָּׂא־חֵ֥ן וָחֶ֛סֶד לְפָנָ֖יו מִכָּל־הַבְּתוּלֹ֑ת וַיָּ֤שֶׂם כֶּֽתֶר־מַלְכוּת֙ בְּרֹאשָׁ֔הּ וַיַּמְלִיכֶ֖הָ תַּ֥חַת וַשְׁתִּֽי׃
(17) And the king loved Esther above all the women, and she obtained grace and favour in his sight more than all the virgins; so that he set the royal crown upon her head, and made her queen instead of Vashti.
ויאהב המלך את אסתר מכל הנשים ותשא חן וחסד לפניו מכל הבתולות אמר רב ביקש לטעום טעם בתולה טעם טעם בעולה טעם
"And the king loved Esther more than all the women, and she found more favor and kindness before him than all the [other] virgins." Rav said [if] he sought to experience a virgin, he experienced it; [if] to experience a non-virgin, he experienced it.
(טז) לֵךְ֩ כְּנ֨וֹס אֶת־כָּל־הַיְּהוּדִ֜ים הַֽנִּמְצְאִ֣ים בְּשׁוּשָׁ֗ן וְצ֣וּמוּ עָ֠לַי וְאַל־תֹּאכְל֨וּ וְאַל־תִּשְׁתּ֜וּ שְׁלֹ֤שֶׁת יָמִים֙ לַ֣יְלָה וָי֔וֹם גַּם־אֲנִ֥י וְנַעֲרֹתַ֖י אָצ֣וּם כֵּ֑ן וּבְכֵ֞ן אָב֤וֹא אֶל־הַמֶּ֙לֶךְ֙ אֲשֶׁ֣ר לֹֽא־כַדָּ֔ת וְכַאֲשֶׁ֥ר אָבַ֖דְתִּי אָבָֽדְתִּי׃
(16) ’Go, gather together all the Jews that are present in Shushan, and fast ye for me, and neither eat nor drink three days, night or day; I also and my maidens will fast in like manner; and so will I go in unto the king, which is not according to the law; and if I perish, I perish.’
לך כנוס את כל היהודים וגו' עד אשר לא כדת אמר רבי אבא שלא כדת היה שבכל יום ויום עד עכשיו באונס ועכשיו ברצון וכאשר אבדתי אבדתי כשם שאבדתי מבית אבא כך אובד ממך
"Go, gather all of the Jews, etc." until "which is not according to custom." Rabbi Abba said that it was not 'according to custom', because each and every day until now it was forced; but now, willingly. "And if I perish, I perish." Because I have already perished from the house of my father; so I will perish from you.
(ה) וַיַּכּ֤וּ הַיְּהוּדִים֙ בְּכָל־אֹ֣יְבֵיהֶ֔ם מַכַּת־חֶ֥רֶב וְהֶ֖רֶג וְאַבְדָ֑ן וַיַּֽעֲשׂ֥וּ בְשֹׂנְאֵיהֶ֖ם כִּרְצוֹנָֽם׃ (ו) וּבְשׁוּשַׁ֣ן הַבִּירָ֗ה הָרְג֤וּ הַיְּהוּדִים֙ וְאַבֵּ֔ד חֲמֵ֥שׁ מֵא֖וֹת אִֽישׁ׃

(5) And the Jews smote all their enemies with the stroke of the sword, and with slaughter and destruction, and did what they would unto them that hated them. (6) And in Shushan the castle the Jews slew and destroyed five hundred men.

(טו) וַיִּֽקָּהֲל֞וּ היהודיים [הַיְּהוּדִ֣ים] אֲשֶׁר־בְּשׁוּשָׁ֗ן גַּ֠ם בְּי֣וֹם אַרְבָּעָ֤ה עָשָׂר֙ לְחֹ֣דֶשׁ אֲדָ֔ר וַיַּֽהַרְג֣וּ בְשׁוּשָׁ֔ן שְׁלֹ֥שׁ מֵא֖וֹת אִ֑ישׁ וּבַ֨בִּזָּ֔ה לֹ֥א שָׁלְח֖וּ אֶת־יָדָֽם׃ (טז) וּשְׁאָ֣ר הַיְּהוּדִ֡ים אֲשֶׁר֩ בִּמְדִינ֨וֹת הַמֶּ֜לֶךְ נִקְהֲל֣וּ ׀ וְעָמֹ֣ד עַל־נַפְשָׁ֗ם וְנ֙וֹחַ֙ מֵאֹ֣יְבֵיהֶ֔ם וְהָרֹג֙ בְּשֹׂ֣נְאֵיהֶ֔ם חֲמִשָּׁ֥ה וְשִׁבְעִ֖ים אָ֑לֶף וּבַ֨בִּזָּ֔ה לֹ֥א שָֽׁלְח֖וּ אֶת־יָדָֽם׃ (יז) בְּיוֹם־שְׁלֹשָׁ֥ה עָשָׂ֖ר לְחֹ֣דֶשׁ אֲדָ֑ר וְנ֗וֹחַ בְּאַרְבָּעָ֤ה עָשָׂר֙ בּ֔וֹ וְעָשֹׂ֣ה אֹת֔וֹ י֖וֹם מִשְׁתֶּ֥ה וְשִׂמְחָֽה׃ (יח) והיהודיים [וְהַיְּהוּדִ֣ים] אֲשֶׁר־בְּשׁוּשָׁ֗ן נִקְהֲלוּ֙ בִּשְׁלֹשָׁ֤ה עָשָׂר֙ בּ֔וֹ וּבְאַרְבָּעָ֥ה עָשָׂ֖ר בּ֑וֹ וְנ֗וֹחַ בַּחֲמִשָּׁ֤ה עָשָׂר֙ בּ֔וֹ וְעָשֹׂ֣ה אֹת֔וֹ י֖וֹם מִשְׁתֶּ֥ה וְשִׂמְחָֽה׃
(15) And the Jews that were in Shushan gathered themselves together on the fourteenth day also of the month Adar, and slew three hundred men in Shushan; but on the spoil they laid not their hand. (16) And the other Jews that were in the king’s provinces gathered themselves together, and stood for their lives, and had rest from their enemies, and slew of them that hated them seventy and five thousand—but on the spoil they laid not their hand—. (17) on the thirteenth day of the month Adar, and on the fourteenth day of the same they rested, and made it a day of feasting and gladness. (18) But the Jews that were in Shushan assembled together on the thirteenth day thereof, and on the fourteenth thereof; and on the fifteenth day of the same they rested, and made it a day of feasting and gladness and they ate.
אמר רבא מיחייב איניש לבסומי בפוריא עד דלא ידע בין ארור המן לברוך מרדכי

Raba said: A man is obligated to mellow oneself [get drunk] until he does not know the difference between 'cursed is Haman' and 'Blessed is Mordechai.'

(ב) חייב אינש לבסומי בפוריא עד דלא ידע בין ארור המן לברוך מרדכי: הגה: וי"א דא"צ להשתכר כל כך אלא שישתה יותר מלימודו (כל בו) ויישן ומתוך שיישן אינו יודע בין ארור המן לברוך מרדכי (מהרי"ל) ואחד המרבה ואחד הממעיט ובלבד שיכוין לבו לשמים

(2) One is obligated to be intoxicated on Purim to the point where he does not know [the difference] between "accursed is Haman" and "blessed is Mordechai". Rama: Some say it is not necessary to become drunk so much, but rather to drink more than he is used to (Kol Bo), and to fall asleep, and while he sleeps he does not know [the difference] between "accursed is Haman" and "blessed is Mordechai" (Maharil). [There is no difference] between one who has more and one who has less, as long as his heart is directed to heaven.

Be'ur Halachah, 695

"A person is obligated." One might ask, how can the sages obligate that which is mentioned in the Torah, Prophets, and other places, namely that drunkenness is a great pitfall? It is because all the miracles that were wrought for the Jewish people in the days of Ahasuerus were on account of drinking. In the beginning, Vashti was bothered on account of drinking and Esther came. Also, Haman's downfall was on account of drinking. Therefore, the sages obligate us to drink so that the great miracle will be remembered with wine drinking. In any case, this is a mitzvah but not an indispensable condition.

"He will not be aware [of the difference]." We should not become drunk and demean ourselves by rejoicing. We are not commanded to rejoice for the sake of debauchery and stupidity, rather we should rejoice with a delight that leads us to love G-d and acknowledge the miracles wrought for us.