We secretly sin, God makes me know wisdom in the hidden part

Despite our secret sins against the holy God,

God who is full of grace and mercy rebukes our secret sins

and makes us know wisdom in the hidden part (Ps. 51:6).

What is the wisdom that God makes us know in the hidden part?

I think there are two things:

1. The Lord desires truth in the innermost being (v. 6)
2. The sacrifices of God are a broken spirit and a contrite heart (v. 17).