Read Exodus 34:1-4,26-35
Moses was changed when he came down from the mountain. Earlier, he had asked to see the glory of the Lord, but when he came down from the mountain with the two tablets of stone, he did not know "that the skin of his face shone while he talked with him" (Ex. 34:29).
Moses did not realize that his face reflected the glory of God. This was proof of the closeness between Moses and God, and it revealed to those who saw him that he had truly been in the presence of God's glory.
"When Aaron and all the children of Israel saw Moses, behold, the skin of his face shone; and they were afraid to come nigh him" (v. 30).
Moses still did not realize the extent to which his face reflected the glory of God. He was not glorious in his own eyes, but he was in the eyes of others.
Every day before you go out to meet the world, spend some time with God by reading His Word and talking to Him in prayer. Spending time in His presence will bring the sunshine of heaven to your face, and others will observe this in you throughout the day.
"But we all, with open face beholding as in a glass the glory of the Lord, are changed into the same image from glory to glory, even as by the Spirit of the Lord" (2 Cor. 3:18).