Atheism—the belief that God doesn't exist—is almost as old as the human race, and the arguments atheists used hundreds of years ago are the same ones they use today, with only slight modifications.
And yet in spite of their arguments, religion hasn't vanished over the centuries, and convinced atheists actually are few in number. In fact, today large numbers of people are turning to Christ in countries that used to be officially atheistic (such as the former Soviet Union).
Why is this? One reason is because they realize that atheism has no answer to the deepest yearnings of the human heart. Down inside, we all yearn for God—whether we admit it or not—and nothing less than God will satisfy that hunger. God put it there, and only He can fill it; the Bible says, "He has also set eternity in the hearts of men" (Ecclesiastes 3:11).
But another reason most people reject atheism is because they realize it isn't reasonable. Which is more logical—to say the world happened by chance, or that God designed and created it? I think you know the answer. The Bible says, "The heavens declare the glory of God; the skies proclaim the work of his hands" (Psalm 19:1). Don't be deceived, but by faith turn to Christ, who showed us not only that God exists, but that He loves us and wants us to know Him and love Him in return.