everything.

22 He reveals deep and hidden things;
he knows what lies in darkness,
and light dwells with him. (Daniel 2)

God knows everything; we don't. We might think we do, but we simply do not have all the facts. So when we prematurely guess or make insane assumptions, we end up frustrating ourselves and others. We can only place our hope in the fact that God knows everything, and in time and in His will, all will be revealed that needs to be revealed.