What happens to the things that are revealed?

Les explains that Moses said the secret things belong unto the Lord our God, but the things which are revealed are made known by revelation to us and to our children forever, so that we may do all the words of this Law. Moses wrote under the Law, but he dealt with the same God we deal with, who kept things secret until He saw fit to reveal them. Ephesians 1:9 speaks of having made known unto us the mystery, or the secret, of His will, according to His good pleasure purposed in Himself, showing that everything starts and finishes in the mind of God.