We should speak only to those who hearken
Figuratively: There is no point in trying to explain or persuade someone who does not listen or try to understand what is being said to them.
("When you received the Torah your name was called Israel, as it is said: 'Hear, O My people, and I will speak; O Israel, and I will testify against you.' We speak only to one who listens" – Midrash Tanchuma (Buber), Parashat Yitro, Siman 15)
Translation
Expression (Hebrew)
אֵין מְדַבְּרִים אֶלָּא לְמִי שֶׁהוּא שׁוֹמֵעַ
Definition (Hebrew)
בְּהַשְׁאָלָה: אֵין טַעַם לְנַסּוֹת לְהַסְבִּיר אוֹ לְשַׁכְנֵעַ אָדָם שֶׁאֵינוֹ מַאֲזִין וּמְנַסֶּה לְהָבִין אֶת הַנֶּאֱמָר לוֹ.
("כְּשֶׁקִּבַּלְתֶּם אֶת הַתּוֹרָה שַׂמְכֶם יִשְׂרָאֵל, שֶׁנֶּאֱמַר שָׁמְעָה עַמִּי וַאֲדַבְּרָה יִשְׂרָאֵל ואעידה בָּךְ, אֵין מְדַבְּרִים אֶלָּא לְמִי שֶׁהוּא שׁוֹמֵעַ"- מִדְרָשׁ תנחומא (בּוּבֶּר) פָּרָשַׁת יִתְרוֹ סִימָן טוֹ)