Do We Know God... really?

I've often wondered how so many of us think we know GOD so well. Moses said to the LORD in Exodus 33:13 even after leading Israel out of Egypt, "...shew me now thy way, that I may know thee..." The apostle Paul said in Philippians 3:10, "That I may know him", denoting that after years of serving Christ he was still learning about him even though he was a master teacher. Are we so arrogant to think we really know GOD?