He differentiates between being afraid of God and the fear of the Lord, and there is a distinction. The one who is afraid of God has something to hide. Recall what Adam did when he disobeyed in the Garden of Eden: he hid from the presence of the Lord. On the other hand, the one who fears God is afraid to be away from Him. He runs from disobedience. So the first definition of holy fear is to be terrified to be away from God.
