The countenance is a sign of changing of the heart.
WEB
As a token of the changing of the heart,
DRC37:21
A wicked word shall change the beast: out of which four manner of things arise, good and evil, life and death: and the tongue is continually the ruler of them. There is a man that is subtle and a teacher of many, and yet is unprofitable to his own soul.
LXXE
The countenance is a sign of changing of the heart.