it is not hidden
Psalm 147:19
He sheweth his word unto Jacob, his statutes and his judgments unto Israel.
Psalm 147:20
He hath not dealt so with any nation: and as for his judgments, they have not known them. Praise ye the LORD.
Isaiah 45:19
I have not spoken in secret, in a dark place of the earth: I said not unto the seed of Jacob, Seek ye me in vain: I the LORD speak righteousness, I declare things that are right.
Romans 16:25
Now to him that is of power to stablish you according to my gospel, and the preaching of Jesus Christ, according to the revelation of the mystery, which was kept secret since the world began,
Romans 16:26
But now is made manifest, and by the scriptures of the prophets, according to the commandment of the everlasting God, made known to all nations for the obedience of faith:
Colossians 1:26
Even the mystery which hath been hid from ages and from generations, but now is made manifest to his saints:
Colossians 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: