Col 1:27, 1 Cor 1:24,30, Isa 11:1-2, 1 Cor 2:7-8
It was foretold in the Old Testament that God would put all of God's mysteries into Christ. (Isa 11:1-2)
Isa 11:1 And there shall come forth a rod out of the stem of Jesse, and a Branch shall grow out of his roots: 2 And the spirit of the Lord shall rest upon him, the spirit of wisdom and understanding, the spirit of counsel and might, the spirit of knowledge and of the fear of the Lord;
Jesus, the Christ, is the mystery and wisdom of God. (Col 2:2-3, Col 1:27, 1 Cor 1:24,30, 1 Cor 2:7-8)
Col 2:2 That their hearts might be comforted, being knit together in love, and unto all riches of the full assurance of understanding, to the acknowledgement of the mystery of God, and of the Father, and of Christ; 3 In whom are hid all the treasures of wisdom and knowledge.
Col 1:27 To whom God would make known what is the riches of the glory of this mystery among the Gentiles; which is Christ in you, the hope of glory:
1 Cor 1:24 But unto them which are called, both Jews and Greeks, Christ the power of God, and the wisdom of God. 30 But of him are ye in Christ Jesus, who of God is made unto us wisdom, and righteousness, and sanctification, and redemption:
1 Cor 2:7 But we speak the wisdom of God in a mystery, even the hidden wisdom, which God ordained before the world unto our glory: 8 Which none of the princes of this world knew: for had they known it, they would not have crucified the Lord of glory.