It was once believed that madness was caused by the moon. In fact, the word "lunatic", often used to describe the mentally ill, comes from the word "lunar", for this very reason. In our scientifically advanced culture, we now know it's not true that the moon causes madness. But who would stop believing in the moon because of this? Even if, by some tragedy, someone was confined to their house for their entire life so that they could never see the sky, they likely wouldn't deny the moon exists.
In the same way, many things "we" once thought were directly caused by God or demons, we now know scientific reasons for them. As a man who has never seen the moon, we have never seen God, but to use scientific progression as reason to deny His existence is, dare I say, lunacy. God didn't just disappear when science was conceived. In fact, belief in God helped to conceive it. Rather, our understanding of His dealings with Earth have changed.
Consider, for a moment, a large grandfather clock. Imagine a child asking an adult how it works. The adult, for whatever reason, concocts a story about how the clock maker sits inside the clock, turning the hands. Several years later, the child grows up, buys a grandfather clock and opens it up to find not a man, but a brilliant and complex mechanism of cogs and gears and all sorts of things like that. Should the child therefore assume that because the clockmaker is not in the clock, as they had previously believed, therefore the clock maker does not exist?
Science is a wonderful tool, teaching us many things about our wonderful universe, but to say it removes the need for God is just as fallacious as denying the moon or a clockmaker. If we're going to be honest with ourselves, God's brilliant creation testifies to the infinite power and wisdom of its creator.