"To see is to believe." That's what some people say. They believe only in what they can see. But then, it's a common knowledge now that there are many things that we cannot see and yet we know they exist. For instance, we know that there's a Creator of the universe and every little thing in it though we cannot see him. But how do we know that He exists? The article found in the link below will provide an in-depth analysis on this matter. Reading it gives us insight and an awesome sense of wonder.