Note that the complexity of everything - especially life - defies every explanation for existence, except a super intelligent Creator. The more knowledge you have, the more you can only believe in a Creator.
Not believing in the Creator is the religion.

regardless of your level of knowledge, when it comes to this subject matter, the more you try to analyze it based on your human knowledge the more you discover that there is an extent your mind cant extend to regardless of how intelligent and logical you can be. this is a pointer that there is a being that is greater than us that creates us program us to function to certain extent above which we become blank.
as a Christian, i believe in the God that created the heaven and the earth and and from observation and finding, most religion believes in the same God but tries to create their own way of getting to that God through the diverse religion we have. the explanation as to how it all started might not be possibly known by mortals same way the things we manufacture cant give details on how they are being manufactured. religion and the concept of a God is something that is too difficult to analyze but it only makes sense that we human are created by a creator who we term God and that he limits us to certain information regarding the world that we don't have access to.