Deuteronomy 27-30

As Moses was explaining the blessings and curses of God's Law to Israel he made this mysterious statement in 29:29-
"There are other things that the Lord our God has kept secret...."(TEV). Since Paul later spoke about God's revelation of all thing through Christ (Eph. 3:2-5) I wonder if this is the opposite end of Paul's statement to modern believers?
Stuart