When Jesus was on the mountain, the Bible says He was transfigured. Jesus was changed from an ordinary looking man into a figure of light with brilliant beams radiating from his body. The reason His clothes became white was from the light emanating from His body. This is a very important event in Jesus’ life, because it confirms He was not merely a man. He was God in the flesh. For most of His 33 years of human existence, His human flesh obscured and veiled His Deity. But at this time, His true divine nature was revealed.