Great Gastby Quote....WHAT DOES THIS MEAN?

Question

"...'God knows what you've been doing, everything you've been doing. You may fool me, but you can't fool God!' Standing behind him, Michaelis saw with a shock that he was looking at the eyes of Doctor T.J. Eckleburg, which had just emerged, pale and enormous, from dissolving night. 'God sees everything,' repeated Tom"

Answer 1

He means that even if no one else knows what he has done, God knows, and someday he will pay the price for what he has done

Answer 2

Tom becomes obsessed with the eye-doctor sign near his home/garage.  To him it comes to represent the eye of God, and when he discovers his wife is cheating on him, he says that  even though his wife deceived her husband for a long time, God still sees everything.