Puritan Board Post-Graduate
Mystery can mean "hidden", "unknown", "not revealed" - whether the terms are used they are implied. The "Mystery" is certainly revealed but it does not mean that all hidden things that belong to the Lord are.
Everyone can agree that those things hidden and belonging to the lord are mystery. But Van Til's position is that things revealed in God's Word are mysteries and apparent contradictions. Why call something an inexplicable mystery that is part of revelation?