Yes, here are some scriptures. Romans 16: 25-27 Now to Him who is able to establish you according to my gospel and the preaching of Jesus Christ, according to the revelation of the mystery which has been kept secret for long ages past,
26but now is manifested, and by the Scriptures of the prophets, according to the commandment of the eternal God, has been made known to all the nations, leading to obedience of faith;27to the only wise God, through Jesus Christ, be the glory forever. Amen. NASB
Mark 4:10-12 As soon as He was alone, His followers, along with the twelve, began asking Him about the parables.
11And He was saying to them, "To you has been given the mystery of the kingdom of God, but those who are outside get everything in parables, 12so that WHILE SEEING, THEY MAY SEE AND NOT PERCEIVE, AND WHILE HEARING, THEY MAY HEAR AND NOT UNDERSTAND, OTHERWISE THEY MIGHT RETURN AND BE FORGIVEN." NASB
at 2:29 PM on Jan. 26, 2010