He 'verified' nothing; merely made a statement. No one else seems to have had this viewpoint.
And plenty held this viewpoint...
Deut. 29: 29 secret things belong unto the Lord.
Ps. 25: 14 secret of the Lord is with them that fear him.
Dan. 2: 28 God in heaven that revealeth secrets.
Matt. 13: 11 (Mark 4: 11; Luke 8: 10) given unto you to know the mysteries.
Rom. 11: 25 I would not . . . that ye should be ignorant of this mystery.
Rom. 16: 25 according to the revelation of the mystery.
1 Cor. 2: 7 we speak the wisdom of God in a mystery.
1 Cor. 4: 1 ministers of Christ, and stewards of the mysteries of God.
1 Cor. 13: 2 understand all mysteries . . . and have not charity.
1 Cor. 14: 2 in the spirit he speaketh mysteries.
1 Cor. 15: 51 I shew you a mystery.
Eph. 1: 9 made known unto us the mystery of his will.
Eph. 3: 3 by revelation he made known unto me the mystery.
Eph. 3: 9 make all men see what is the fellowship of the mystery.
Eph. 5: 32 a great mystery: but I speak concerning Christ.
Eph. 6: 19 make known the mystery of the gospel.
Col. 1: 26 mystery which hath been hid from ages.
1 Tim. 3: 16 (1 Tim. 3: 9) great is the mystery of godliness.
Rev. 10: 7 mystery of God should be finished.