Deuteronomy 29:29 says "the secret things belong unto the LORD our God: but those things which are revealed belong unto us and to our children for ever, that we may do all the words of this law".     

     Every person have some secrets. But God has no secrets because He has revealed everything through His words.

     Someone will say how everything Pastor this verse says some things are still belongs to Lord and He has revealed some of them. Listen this was for Old Testament. In New Testament God has revealed everything through His Son Lord Jesus Christ (Hebrew 1:2) to You. 

     You know everything about God, Prayer, Heaven, Kingdom, Power, Grace, Love, Salvation, Redemption, End Time and everything. Don't You.