לֹא עָלֶיךָ הַמְּלָאכָה לִגְמֹר, וְלֹא אַתָּה בֶן חוֹרִין לִבָּטֵל מִמֶּנָּה.

It is not your responsibility to finish the work, but neither are you free to desist from it.

(א) וַֽיְהִ֥י כָל־הָאָ֖רֶץ שָׂפָ֣ה אֶחָ֑ת וּדְבָרִ֖ים אֲחָדִֽים׃ (ב) וַֽיְהִ֖י בְּנָסְעָ֣ם מִקֶּ֑דֶם וַֽיִּמְצְא֥וּ בִקְעָ֛ה בְּאֶ֥רֶץ שִׁנְעָ֖ר וַיֵּ֥שְׁבוּ שָֽׁם׃ (ג) וַיֹּאמְר֞וּ אִ֣ישׁ אֶל־רֵעֵ֗הוּ הָ֚בָה נִלְבְּנָ֣ה לְבֵנִ֔ים וְנִשְׂרְפָ֖ה לִשְׂרֵפָ֑ה וַתְּהִ֨י לָהֶ֤ם הַלְּבֵנָה֙ לְאָ֔בֶן וְהַ֣חֵמָ֔ר הָיָ֥ה לָהֶ֖ם לַחֹֽמֶר׃ (ד) וַיֹּאמְר֞וּ הָ֣בָה ׀ נִבְנֶה־לָּ֣נוּ עִ֗יר וּמִגְדָּל֙ וְרֹאשׁ֣וֹ בַשָּׁמַ֔יִם וְנַֽעֲשֶׂה־לָּ֖נוּ שֵׁ֑ם פֶּן־נָפ֖וּץ עַל־פְּנֵ֥י כָל־הָאָֽרֶץ׃ (ה) וַיֵּ֣רֶד יְהוָ֔ה לִרְאֹ֥ת אֶת־הָעִ֖יר וְאֶת־הַמִּגְדָּ֑ל אֲשֶׁ֥ר בָּנ֖וּ בְּנֵ֥י הָאָדָֽם׃ (ו) וַיֹּ֣אמֶר יְהוָ֗ה הֵ֣ן עַ֤ם אֶחָד֙ וְשָׂפָ֤ה אַחַת֙ לְכֻלָּ֔ם וְזֶ֖ה הַחִלָּ֣ם לַעֲשׂ֑וֹת וְעַתָּה֙ לֹֽא־יִבָּצֵ֣ר מֵהֶ֔ם כֹּ֛ל אֲשֶׁ֥ר יָזְמ֖וּ לַֽעֲשֽׂוֹת׃ (ז) הָ֚בָה נֵֽרְדָ֔ה וְנָבְלָ֥ה שָׁ֖ם שְׂפָתָ֑ם אֲשֶׁר֙ לֹ֣א יִשְׁמְע֔וּ אִ֖ישׁ שְׂפַ֥ת רֵעֵֽהוּ׃ (ח) וַיָּ֨פֶץ יְהוָ֥ה אֹתָ֛ם מִשָּׁ֖ם עַל־פְּנֵ֣י כָל־הָאָ֑רֶץ וַֽיַּחְדְּל֖וּ לִבְנֹ֥ת הָעִֽיר׃ (ט) עַל־כֵּ֞ן קָרָ֤א שְׁמָהּ֙ בָּבֶ֔ל כִּי־שָׁ֛ם בָּלַ֥ל יְהוָ֖ה שְׂפַ֣ת כָּל־הָאָ֑רֶץ וּמִשָּׁם֙ הֱפִיצָ֣ם יְהוָ֔ה עַל־פְּנֵ֖י כָּל־הָאָֽרֶץ׃ (פ)
(1) Everyone on earth had the same language and the same words. (2) And as they migrated from the east, they came upon a valley in the land of Shinar and settled there. (3) They said to one another, “Come, let us make bricks and burn them hard.”—Brick served them as stone, and bitumen served them as mortar.— (4) And they said, “Come, let us build us a city, and a tower with its top in the sky, to make a name for ourselves; else we shall be scattered all over the world.” (5) The LORD came down to look at the city and tower that man had built, (6) and the LORD said, “If, as one people with one language for all, this is how they have begun to act, then nothing that they may propose to do will be out of their reach. (7) Let us, then, go down and confound their speech there, so that they shall not understand one another’s speech.” (8) Thus the LORD scattered them from there over the face of the whole earth; and they stopped building the city. (9) That is why it was called Babel, because there the LORD confounded the speech of the whole earth; and from there the LORD scattered them over the face of the whole earth.

Theodor Herzl, "The Jewish State" (1896)

The Jews who will it shall achieve their State. We shall live at last as free men on our own soil, and in our own homes peacefully die. The world will be liberated by our freedom, enriched by our wealth, magnified by our greatness. And whatever we attempt there for our own benefit will redound mightily and beneficially to the good of all mankind.

רַבִּי נַחְמָן בַּר שְׁמוּאֵל בַּר נַחְמָן בְּשֵׁם רַב שְׁמוּאֵל בַּר נַחְמָן אָמַר, הִנֵּה טוֹב מְאֹד, זֶה יֵצֶר טוֹב. וְהִנֵּה טוֹב מְאֹד, זֶה יֵצֶר רָע. וְכִי יֵצֶר הָרָע טוֹב מְאֹד, אֶתְמְהָא. אֶלָּא שֶׁאִלּוּלֵי יֵצֶר הָרָע לֹא בָּנָה אָדָם בַּיִת, וְלֹא נָשָׂא אִשָּׁה, וְלֹא הוֹלִיד, וְלֹא נָשָׂא וְנָתַן. וְכֵן שְׁלֹמֹה אוֹמֵר (קהלת ד, ד): כִּי הִיא קִנְאַת אִישׁ מֵרֵעֵהוּ.

Rabbi Nahman said in Rabbi Samuel's name: 'Behold, it was good' refers to the Good Desire; 'And behold, it was very good' refers to the Evil Desire. (It only says 'very good' after man was created with both the good and bad inclinations, in all other cases it only says 'and God saw that it was good') Can then the Evil Desire be very good? That would be extraordinary! But without the Evil Desire, however, no man would build a house, take a wife, beget children or conduct business; and thus said Solomon: 'Again, I considered all labour and all excelling in work, that it is a man's rivalry with his neighbour.' (Ecclesiastes 4:4)

בֶּן הֵא הֵא אוֹמֵר, לְפוּם צַעֲרָא אַגְרָא:

Ben Hey Hey says: According to the struggle is the reward.