'Countenance' in the Bible

“And whenever you are fasting, do not look gloomy like the hypocrites, for they put on a sad and dismal face [like actors, discoloring their faces with ashes or dirt] so that their fasting may be seen by men. I assure you and most solemnly say to you, they [already] have their reward in full.

But the man was saddened at Jesus’ words, and he left grieving, because he owned much property and had many possessions [which he treasured more than his relationship with God].

As He was praying, the appearance of His face became different [actually transformed], and His clothing became white and flashing with the brilliance of lightning.