Ecclesiastes 3:11 He has made everything beautiful in its time. Also He has put eternity in their hearts, except that no one can find out the work that God does from beginning to end.
Deuteronomy 29:29 “The secret things belong to the LORD our God, but those things which are revealed belong to us and to our children forever, that we may do all the words of this law.
1 Corinthians 2:7-8 But we speak the wisdom of God in a mystery, the hidden wisdom which God ordained before the ages for our glory, which none of the rulers of this age knew; for had they known, they would not have crucified the Lord of glory.
1 Corinthians 4:1 Let a man so consider us, as servants of Christ and stewards of the mysteries of God.
Ephesians 1:9-10 having made known to us the mystery of His will, according to His good pleasure which He purposed in Himself, that in the dispensation of the fullness of the times He might gather together in one all things in Christ, both which are in heaven and which are on earth—in Him.
Revelation 10:7 but in the days of the sounding of the seventh angel, when he is about to sound, the mystery of God would be finished, as He declared to His servants the prophets.
