Happy is the student whose teacher admits he is right
Happy is that student whose teacher accepted his words and even preferred them over his own opinion. A compliment for a clever student who said something wise or corrected his teacher's words.
("The Lord said: I have forgiven according to your word. It was taught in the school of Rabbi Ishmael: According to your word, so will the nations of the world say. Happy is the student whose teacher admits he is right" - Berakhot 15a)
Translation
Expression (Hebrew)
אַשְׁרֵי הַתַּלְמִיד שֶׁרַבּוֹ מוֹדֶה לוֹ
Definition (Hebrew)
מְאֻשָּׁר הוּא אוֹתוֹ תַּלְמִיד שֶׁמּוֹרוֹ קִבֵּל אֶת דְּבָרָיו וְאַף הֶעֱדִיפָם עַל פְּנֵי דַּעְתּוֹ. מַחְמָאָה לַתַּלְמִיד פִּקֵּחַ שֶׁאָמַר דָּבָר חָכָם אוֹ שֶׁתִּקֵּן אֶת דִּבְרֵי מוֹרוֹ.
("אָמַר ה' סָלַחְתִּי כִּדְבָרֶיךָ. תַּנֵּי דְּבֵי רַבִּי יִשְׁמָעֵאל: כִּדְבָרֶיךָ עֲתִידִים אֻמּוֹת הָעוֹלָם לוֹמַר כֵּן. אַשְׁרֵי תַּלְמִיד שֶׁרַבּוֹ מוֹדֶה לוֹ"- בְּרָכוֹת לֵב ע"א)