Do you ever watch those makeover shows where they reveal the house bit by bit? That’s one of the ways God reveals his secrets.
He said to them, To you it has been given to [come progressively to] know (to recognize and understand more strongly and clearly) the mysteries and secrets of the kingdom of God, but for others they are in parables, so that, [though] looking, they may not see; and hearing, they may not comprehend.(Luke 8:10, AMP)
But it seems that Jesus couldn’t keep a secret at all!
Jesus answered him, I have spoken openly to the world. I have always taught in a synagogue and in the temple [area], where the Jews [habitually] congregate (assemble); and I have spoken nothing secretly. (John 18:20, AMP)