Lech Lecha: Why Abraham?
(א) וַיֹּ֤אמֶר יי אֶל־אַבְרָ֔ם לֶךְ־לְךָ֛ מֵאַרְצְךָ֥ וּמִמּֽוֹלַדְתְּךָ֖ וּמִבֵּ֣ית אָבִ֑יךָ אֶל־הָאָ֖רֶץ אֲשֶׁ֥ר אַרְאֶֽךָּ׃ (ב) וְאֶֽעֶשְׂךָ֙ לְג֣וֹי גָּד֔וֹל וַאֲבָ֣רֶכְךָ֔ וַאֲגַדְּלָ֖ה שְׁמֶ֑ךָ וֶהְיֵ֖ה בְּרָכָֽה׃ (ג) וַאֲבָֽרֲכָה֙ מְבָ֣רְכֶ֔יךָ וּמְקַלֶּלְךָ֖ אָאֹ֑ר וְנִבְרְכ֣וּ בְךָ֔ כֹּ֖ל מִשְׁפְּחֹ֥ת הָאֲדָמָֽה׃ (ד) וַיֵּ֣לֶךְ אַבְרָ֗ם כַּאֲשֶׁ֨ר דִּבֶּ֤ר אֵלָיו֙ יי וַיֵּ֥לֶךְ אִתּ֖וֹ ל֑וֹט וְאַבְרָ֗ם בֶּן־חָמֵ֤שׁ שָׁנִים֙ וְשִׁבְעִ֣ים שָׁנָ֔ה בְּצֵאת֖וֹ מֵחָרָֽן׃

(1) The Eternal said to Abram, “Go forth from your land, from your birthplace, and from your father’s house to the land that I will show you. (2) I will make of you a great nation, and I will bless you; I will make your name great, and you shall be a blessing. (3) I will bless those who bless you and curse those that curses you; and all the families of the earth shall bless themselves by you.” (4) Abram went forth as the Eternal had commanded him, and Lot went with him. Abram was seventy-five years old when he left Haran.

Abraham the Precocious Philospoher

Beit Hamidrash 2:118-196, Sefer Ha-Aggadah 31:5

When Abraham was three years old, he...wondered in his heart: “Who created heaven and earth and me?” All that day he prayed to the sun. In the evening, the sun set in the west and the moon rose in the east. Upon seeing the moon and the stars around it, he said: “This one must have created heaven and earth and me - these stars must be the moon's princes and courtiers.” So all night long he stood in prayer to the moon. In the morning, the moon sank in the west and the sun rose in the east. Then he said: “There is no might in either of these. There must be a high Ruler over them, to this One I will pray and prostrate myself.”

וַיָּמָת הָרָן עַל פְּנֵי תֶּרַח אָבִיו (בראשית יא, כח), רַבִּי חִיָּא בַּר בְּרֵיהּ דְּרַב אַדָא דְּיָפוֹ, תֶּרַח עוֹבֵד צְלָמִים הָיָה, חַד זְמַן נְפֵיק לַאֲתַר, הוֹשִׁיב לְאַבְרָהָם מוֹכֵר תַּחְתָּיו. הֲוָה אָתֵי בַּר אֵינַשׁ בָּעֵי דְּיִזְבַּן, וַהֲוָה אֲמַר לֵהּ בַּר כַּמָּה שְׁנִין אַתְּ, וַהֲוָה אֲמַר לֵיהּ בַּר חַמְשִׁין אוֹ שִׁתִּין, וַהֲוָה אֲמַר לֵיהּ וַי לֵיהּ לְהַהוּא גַבְרָא דַּהֲוָה בַּר שִׁתִּין וּבָעֵי לְמִסְגַּד לְבַר יוֹמֵי, וַהֲוָה מִתְבַּיֵּשׁ וְהוֹלֵךְ לוֹ. חַד זְמַן אֲתָא חַד אִתְּתָא טְעִינָא בִּידָהּ חָדָא פִּינָךְ דְּסֹלֶת, אֲמָרָהּ לֵיהּ הֵא לָךְ קָרֵב קֳדָמֵיהוֹן, קָם נְסֵיב בּוּקְלָסָא בִּידֵיהּ, וְתַבְרִינוּן לְכָלְהוֹן פְּסִילַיָא, וִיהַב בּוּקְלָסָא בִּידָא דְּרַבָּה דַּהֲוָה בֵּינֵיהוֹן. כֵּיוָן דַּאֲתָא אֲבוּהָ אֲמַר לֵיהּ מַאן עָבֵיד לְהוֹן כְּדֵין, אֲמַר לֵיהּ מַה נִּכְפּוּר מִינָךְ אֲתַת חָדָא אִתְּתָא טְעִינָא לָהּ חָדָא פִּינָךְ דְּסֹוֹלֶת, וַאֲמַרַת לִי הֵא לָךְ קָרֵיב קֳדָמֵיהון, קָרֵיבְתְּ לָקֳדָמֵיהוֹן הֲוָה דֵּין אֲמַר אֲנָא אֵיכוֹל קַדְמָאי, וְדֵין אֲמַר אֲנָא אֵיכוֹל קַדְמָאי, קָם הָדֵין רַבָּה דַּהֲוָה בֵּינֵיהוֹן נְסַב בּוּקְלָסָא וְתַבַּרִינוֹן. אֲמַר לֵיהּ מָה אַתָּה מַפְלֶה בִּי, וְיָדְעִין אִינוּן. אֲמַר לֵיהּ וְלֹא יִשְׁמְעוּ אָזְנֶיךָ מַה שֶּׁפִּיךָ אוֹמֵר. נַסְבֵיהּ וּמְסָרֵיהּ לְנִמְרוֹד. אֲמַר לֵיהּ נִסְגוֹד לְנוּרָא, אֲמַר לֵיהּ אַבְרָהָם וְנִסְגּוֹד לְמַיָא דְּמַטְפִין נוּרָא. אֲמַר לֵיהּ נִמְרוֹד נִסְגּוֹד לְמַיָא, אֲמַר לֵיהּ אִם כֵּן נִסְגּוֹד לַעֲנָנָא דְּטָעִין מַיָא. אֲמַר לֵיהּ נִסְגּוֹד לַעֲנָנָא. אָמַר לֵיהּ אִם כֵּן נִסְגּוֹד לְרוּחָא דִּמְבַדַּר עֲנָנָא. אֲמַר לֵיהּ נִסְגּוֹד לְרוּחָא. אֲמַר לֵיהּ וְנִסְגּוֹד לְבַר אֵינָשָׁא דְּסָבֵיל רוּחָא. אֲמַר לֵיהּ מִלִּין אַתְּ מִשְׁתָּעֵי, אֲנִי אֵינִי מִשְׁתַּחֲוֶה אֶלָּא לָאוּר, הֲרֵי אֲנִי מַשְׁלִיכֲךָ בְּתוֹכוֹ, וְיָבוֹא אֱלוֹהַּ שֶׁאַתָּה מִשְׁתַּחֲוֶה לוֹ וְיַצִּילְךָ הֵימֶנּוּ. הֲוָה תַּמָן הָרָן קָאֵים פְּלוּג, אָמַר מַה נַּפְשָׁךְ אִם נָצַח אַבְרָהָם אֲנָא אָמַר מִן דְּאַבְרָהָם אֲנָא וְאִם נָצַח נִמְרוֹד אֲנָא אֲמַר דְּנִמְרוֹד אֲנָא. כֵּיוָן שֶׁיָּרַד אַבְרָהָם לְכִבְשַׁן הָאֵשׁ וְנִצֹּל, אָמְרִין לֵיהּ דְּמַאן אַתְּ, אֲמַר לְהוֹן מִן אַבְרָהָם אֲנָא, נְטָלוּהוּ וְהִשְּׁלִיכוּהוּ לָאוּר וְנֶחְמְרוּ בְּנֵי מֵעָיו, וְיָצָא וּמֵת עַל פְּנֵי תֶּרַח אָבִיו, הֲדָא הוּא דִכְתִיב: וַיָּמָת הָרָן עַל פְּנֵי תֶּרַח וגו'.

Abraham the Iconoclast

[Genesis 11:28 says,] “And Haran died in the presence of his father Terach.” Rabbi Hiyya said: Terach was a manufacturer of idols. He once went away somewhere and left Abraham to sell them in his place. A man came in and wished to buy one."How old are you?" Abraham asked the man. "Fifty years old," he said. "Woe to such a man, who is fifty years old and would worship a day old object!" Avraham said.

On another occasion a woman came in with a plateful of flour and requested him, "Take this and offer it to them." So he took a stick and broke them, and put the stick in the hand of the largest. When his father returned he demanded, "What have you done to them?" "I cannot conceal it from you. A woman came with a plateful of fine meal and requested me to offer it to them. One claimed, 'I must eat first,' while another claimed, 'I must eat first.' Thereupon, the largest arose, took the stick and broke them." "Why do you make sport of me? Have they any knowledge?" Terach said. "Should not your ears hear what your mouth has said?" Avraham said.

(א) וַיֹּאמֶר יי אֶל אַבְרָם לֶךְ לְךָ מֵאַרְצְךָ וגו' (בראשית יב, א), רַבִּי יִצְחָק פָּתַח (תהלים מה, יא): שִׁמְעִי בַת וּרְאִי וְהַטִּי אָזְנֵךְ וְשִׁכְחִי עַמֵּךְ וּבֵית אָבִיךְ, אָמַר רַבִּי יִצְחָק מָשָׁל לְאֶחָד שֶׁהָיָה עוֹבֵר מִמָּקוֹם לְמָקוֹם, וְרָאָה בִּירָה אַחַת דּוֹלֶקֶת, אָמַר תֹּאמַר שֶׁהַבִּירָה הַזּוֹ בְּלֹא מַנְהִיג, הֵצִיץ עָלָיו בַּעַל הַבִּירָה, אָמַר לוֹ אֲנִי הוּא בַּעַל הַבִּירָה. כָּךְ לְפִי שֶׁהָיָה אָבִינוּ אַבְרָהָם אוֹמֵר תֹּאמַר שֶׁהָעוֹלָם הַזֶּה בְּלֹא מַנְהִיג, הֵצִיץ עָלָיו הַקָּדוֹשׁ בָּרוּךְ הוּא וְאָמַר לוֹ אֲנִי הוּא בַּעַל הָעוֹלָם. (תהלים מה, יב): וְיִתְאָו הַמֶּלֶךְ יָפְיֵךְ כִּי הוּא אֲדֹנַיִךְ. וְיִתְאָו הַמֶּלֶךְ יָפְיֵךְ, לְיַפּוֹתֵךְ בָּעוֹלָם, (תהלים מה, יב): וְהִשְׁתַּחֲוִי לוֹ, הֱוֵי וַיֹּאמֶר יי אֶל אַבְרָם.

Abraham the One Who Sees and Hears

(1) "God said to Abram, 'Go forth from your land…'" (Genesis 12:1)... Rabbi Yitzchak said: this may be compared to a person who was traveling from place to place and saw a palace on fire [alt. Lit up with torches]. He said, "Is it possible that this palace lacks a person to look after it?" The custodian of the building looked at him and said to him, 'I am the master of the castle.'" What happened with Abraham our father was similar. He said, “Is it possible that this universe lacks a person to look after it?," the Holy Blessed One looked at him and said to him, 'I am the Master of the Universe.'"

Sfas Emes, Lech Lecha - translated by Rabbi Yael Saidoff

The Ramban noted an unresolved issue in our parsha - that God says "Lech lecha (go forward) ..." without first mentioning why Avraham in particular was so precious as to receive such a command. It appears to me that the holy Zohar sees this very fact as what makes Avraham praiseworthy. He heard the call of “go forward” which comes out from God to all people at all times, as it says “Woe to those that sleep with eyes fast closed and do not know or consider how they will arise in the Day of Judgment; for reckoning is exacted.” Our father Avraham heard the call and received its message. As a result, the call is attributed as only going out to him, because he was the singular one to hear it. Certainly, this itself is his greatest praise - that he was ready to receive the call.