Have the courage of (someone's) convictions

Translation of "have the courage of (someone's) convictions" into Russian

иметь мужество следовать своим убеждениям

He had the courage of his convictions and stood by his decision.

Он имел мужество следовать своим убеждениям и стоял на своем решении.

To act in accordance with one's beliefs and values, even in the face of opposition or difficulty.