'Secrets' in the Bible

Jesus replied to them, “To you it has been granted to know the mysteries of the kingdom of heaven, but to them it has not been granted.

And He said, “To you [who have been chosen] it has been granted to know and recognize the mysteries of the kingdom of God, but to the rest it is in parables, so that though seeing they may not see, and hearing they may not understand.

the secrets of his heart are laid bare. And so, falling on his face, he will worship God, declaring that God is really among you.

[I always pray] that the God of our Lord Jesus Christ, the Father of glory, may grant you a spirit of wisdom and of revelation [that gives you a deep and personal and intimate insight] into the true knowledge of Him [for we know the Father through the Son].