Habit becomes (custom is) second nature/ custom in infancy becomes nature in old age.
Actions that are done in a fixed manner become part of a person's character. Something that is repeated many times eventually becomes a natural behavior.
("From the idols and the strange customs that were accustomed to do in Egypt, why would it be better for me if they returned to doing them, because the custom became a second nature in them, and it brought them to this, and there was no thing that was renewed in them now" - Abarbanel, the name of the heart-breaking verse, and so: "Man acts by nature, because from the side of the custom The matter is of secondary nature, and this is not justified, because if in establishing laws and times for the Torah, he accustoms himself to come to the house of the midrash at a certain time until the matter has become natural" - I am very dear and read the verse, and it says: "Until he accustoms himself in a few years because the habit has become natural" - it is not a miracle to advise/ or the letter S, year, and it says: "The habit "We became nature. The direction they met was open to him to throw stones with him. At first they were throwing stones among the animals, then they turned to the sides" - Agnon/ Tamol Shilshom, 96)
Translation
Expression (Hebrew)
הֶרְגֵּל נַעֲשָׂה לְטֶבַע
Definition (Hebrew)
מַעֲשִׂים הַנַּעֲשִׂים בְּאֹפֶן קָבוּעַ הוֹפְכִים לְחֵלֶק מֵאָפְיוֹ שֶׁל אָדָם. דָּבָר שֶׁחוֹזְרִים עָלָיו פְּעָמִים רַבּוֹת הוֹפֵךְ לְבַסּוֹף לְהִתְנַהֲגוּת טִבְעִית.
("מִתּוֹךְ הַגִּלּוּלִים וְהָעֲבוֹרוֹת הַזָּרוֹת שֶׁהָיוּ מֻרְגָּלִים לַעֲשׂוֹת בְּמִצְרַיִם לָמָּה יַחֲרֶה אַפְּךָ אִם חָזְרוּ לַעֲשׂוֹתָם כִּי הַהֶרְגֵּל נַעֲשָׂה בָּהֶם טֶבַע שֵׁנִי וְהוּא הֱבִיאָם אֶל זֶה וְלֹא הָיָה דָּבָר שֶׁנִּתְחַדֵּשׁ בָּהֶם עַתָּה"- אַבַּרְבַּנְאֵל שְׁמוֹת פֶּרֶק לֵב, וְכֵן:"שֶׁהָאָדָם פּוֹעֵל בַּטֶּבַע כִּי מִצַּד הַהֶרְגֵּל נַעֲשֶׂה הַדָּבָר לְטֶבַע שֵׁנִי, וְלֹא יִצְדַּק זֶה כִּי אִם בְּקוֹבֵעַ חֻקִּים וְעִתִּים לַתּוֹרָה וְהוּא מַרְגִּיל עַצְמוֹ לָבוֹא לְבֵית הַמִּדְרָשׁ בְּעֵת יָדוּעַ עַד שֶׁנַּעֲשָׂה הַדָּבָר לַטֶּבַע"- כְּלִי יָקָר וַיִּקְרָא פֶּרֶק כו, וְכֵן:"עַד אֲשֶׁר יַרְגִּיל עַצְמוֹ בְּמִעוּט שֵׁנָה כִּי הַהֶרְגֵּל נַעֲשֶׂה טֶבַע"- פֶּלֶא יוֹעֵץ/ אוֹת ש', שֵׁנָה, וְכֵן:"הֶרְגֵּל נַעֲשֶׂה טֶבַע.כֵּיוָן שֶׁנִּפְגְּשׁוּ פָּשְׁטָה לוֹ יָד לְטַיֵּל עִמּוֹ. בָּרִאשׁוֹנָה מְטַיְּלִים הָיוּ בֵּין הַבְּרִיּוֹת אַחַר כָּךְ פּוֹנִים לַצְּדָדִים"-עַגְנוֹן/ תְּמוֹל שִׁלְשׁוֹם, 96)