Where were the doctrines and revelations given through Paul kept before God revealed them to him?
The doctrines and revelations that came through the apostle Paul were for the most part kept secret in the mind of God. They remained hidden there until God chose to reveal them to Paul, showing that He keeps things secret until the time He reveals them.
Les explains that God has the prerogative to keep things secret and hidden until it is time to reveal them. He illustrates this from Luke 18, where Jesus plainly told the Twelve about His coming death and resurrection, yet they understood none of these things because the saying was hidden from them. In the same way, Les emphasizes that the whole sphere of doctrines and revelations that have now come to us through this apostle were for the most part kept secret in the mind of God until He revealed them to the apostle Paul.