It is reasonable to state that whatever your concept of God currently is, this knowledge is very limited. It is impossible for a transient being to understand a transcendent being. It is certain that what we believe we know about God is infinitely less than the reality of His person.
If we can accept for a moment, the self evident truth that the reason for the universe is God, and that He did make us for a purpose, we should at least explore that valid possibility and be willing to investigate Him further.
Let us be honest, the universe, and closer to home, the earth, are reasonable proof for the existence of God. The most logical explanation for any phenomenon of unknown origin, is often the most obvious. A beautifully engineered, intelligently functioning creation, logically originates from an intelligence, rather than the product of random chance.