Religion is not a joke, son. It has engaged the minds and hearts of men and women, from the lowly to the great in all walks of life, throughout human history. Many will tell you it is a crutch for the weak and the feeble-minded. Even a quick perusal of the works of Saint Augustine, Thomas Aquinas, Tolstoy, Dostoevsky or G.K. Chesterton will expose that lie. Yes, there have been brilliant minds who disbelieved in God, as well: Voltaire, Twain, Shaw, etc. You will find that most of them (whether they acknowledged it or not) were attacking religious hypocrisy, folly and bigotry rather than the existence of God Himself. (C.S. Lewis wrote once that there was more holiness in the atheism of Percy Shelley than in the faith of many clergymen.)
I believe in God absolutely. I was raised a Christian, lost my faith at age 17 and scoffed for the next two decades, then gradually returned to God. My reasons are many and they range from the metaphysical to the purely emotional.
I can't do better for you than to recommend one book: Mere Christianity by C.S.Lewis. In clear, concise prose he builds up, plank by plank, the case for believing, first, in God Himself, and, secondly, in the divinity of Jesus Christ.
If you want to explore metaphysical reasons for believing in God, independent of any particular creed, the late Dr. Mortimer J. Adler's How To Think About God is excellent...and very brief, though philisophically rich.
