Many of us have questions about the unknown, about what is beyond. Some of us believe in God, some not. None of us is having the complete answer to everything, we just share what we know in part. Sometimes not everyone will understand an answer like "God is God", "If He decides to do something, who are you to know why" or "We are not meant to know everything" and other similar answers to certain questions that obviously are right in some situations.
Of course that we can not and we will not be able to comprehend everything. But in general I think that God actually wants us to understand, He wants us to comprehend the answers, to accept His truth. That's why He sends His message of salvation to more people possible, so that they can have a knowledge of Him. Obviously not everyone will believe and understand. To believe is the key that will open the portals of His knowledge to us. Not everyone will accept the truth also, but His desire is to reveal Himself to us. I hope you can find some of the answers to your questions here.
"For now we see in a mirror, dimly, but then face to face. Now I know in part, but then I shall know just as I am known."
1 Corinthians 13:12