(Daniel 10:5-9; Exodus 33; Revelation 1: 17a)
While Adam remained in covenant with God, he remained in fellowship with Him. But when he broke it, he became spiritually and physically separated from God and His holiness. He lost the light from God which clothed him. Once that was gone, he entered into darkness and did not want his darkness to be exposed, so he hid it from God and the light from His holiness when he heard the sound of the Lord God walking in the garden, in the cool of the day.