From what I can tell, 'do not pry into things too lofty for you' refers to attempts to philosophically understand the nature of God. The thought that arises is that when you make a seal (as when a signet ring is pressed in wax) you get an image of the seal, which may be very clear and identifiable, but as far as the ring is concerned, you do not know the nature of the ring without seeing the ring itself. And so it is with God.