Where was the mystery hidden before it was revealed to Paul?
The mystery was hidden in the mind of God. It was a secret that God kept within Himself until He revealed it to the Apostle Paul. It was not something known or discovered by humans; it remained concealed in God's own mind before that revelation.
Les explains that the mystery was a secret kept in the mind of God until He revealed it to the Apostle Paul. He notes that people did not know it before that revelation, and we would be no different today apart from God's disclosure. Les contrasts this with the mysteries of pagan religions, which are satanic and kept from the common initiate but known to those at the top. The mystery revealed to Paul was not occult knowledge but God's own hidden counsel, made known through Paul's apostolic ministry.