As the man is, so is his strength
In the Melliza: As is a man. As the days of a man's years and as great as his trials, so great is his might (according to the commentary of "The Fortress of David": As is the value of a man, so is the value of his might).
("And Zebah and Zalmunna said, Rise thou, and fall upon us; for as the man is, so is his strength. And Gideon arose and slew Zebah and Zalmunna" — Judges 8:20; and likewise: "That matron said to them: Your children are not yours!" They said to her: ... "as the man is, so is his strength." — Bava Metzia 84a; and likewise: "He tapped him on the shoulder and said, I am pleased with you; so fitting and so fitting, a man among men, as the man is, so is his strength" — Agnon, Simple Story, 85)
Translation
Expression (Hebrew)
כָאִישׁ גְּבוּרָתוֹ
Definition (Hebrew)
בִּמְלִיצָה: כְּמוֹ גֶּבֶר. כִּימֵי שְׁנוֹתָיו שֶׁל הָאִישׁ וּכְגֹדֶל נִסְיוֹנוֹ כָּךְ גֹּדֶל גְּבוּרָתוֹ (ע"פ פַּרְשָׁנוּת "מְצוּדַת דָּוִד": כְּעֵרֶךְ הָאִישׁ כֵּן עֵרֶךְ גְּבוּרָתוֹ).
("וַיֹּאמֶר זֶבַח וְצַלְמֻנָּע, קוּם אַתָּה וּפְגַע בָּנוּ כִּי כָאִישׁ גְּבוּרָתוֹ וַיָּקָם גִּדְעוֹן וַיַּהֲרֹג אֶת זֶבַח וְאֶת צַלְמֻנָּע"- שׁוֹפְטִים ח כ, וְכֵן:"אָמְרָה לָהֶם הַהִיא מַטְרוֹנִיתָא: בְּנֵיכֶם אֵינָם שֶׁלָּכֶם! , אָמְרוּ לָהּ :...כָּאִישׁ גְּבוּרָתוֹ .אִכָּא דְאָמְרִי, הֲכִי אָמְרוּ לָהּ: אַהֲבָה דּוֹחֶקֶת אֶת הַבָּשָׂר"- בָּבָא מְצִיעָא פֵּד ע"א, וְכֵן:"טָפַח לוֹ עַל כְּתֵפוֹ וְאָמַר, מְרֻצֶּה אֲנִי מִמְּךָ, כָּךְ נָאֶה וְכָךְ נָאֶה, גֶּבֶר בְּגֻבְרִין, כְּאִישׁ גְּבוּרָתוֹ"-עַגְנוֹן/ סִפּוּר פָּשׁוּט,85)