The human mind cannot compehend something without a beginning. Try it yourself, think of anything not having a beginning, even a God. So we can't understand the universe or God, although we can at least see some of the universe since we are part of it. But we can't see or talk with God which makes it very hard to believe he really exist.
You can develope a faith in something called God and think he wrote us a book and appointed men to represent him but if you carefully examine this philosophy it breaks down to just an idea created by some men. This book he supposedly wrote tells of talking serpants, donkeys, demons who can get into humans and pigs, how he made all the languages at one time when they were building a tower, a worldwide rain that covered all mountains, making a woman turn to salt, a man who walks on water, a man who was eaten by a fish and three days later came out alive and well. Now for 2000 years he hasn't done a thing, but anytime now, soon, very soon he will destroy the earth, of course earth doesn't mean earth, it means evil people.