I loved this post by Matt Popovits regarding "The Evidence for God." He does an incredible job laying out four basic ways that God reveals himself to man and brings up some interesting thoughts on Agnosticism, Atheism, and Christianity.
"When you choose to see it, evidence of God is everywhere. And what I’ve found is that in the face of such evidence most skeptics, who claim they can’t know if God is real, choose to live as if they’re certain He isn’t. Though they might label themselves as agnostic they live like an atheist, not praying, not worshipping, not reading the Scriptures, not even attempting to find Him or connect with Him."
Matt's blog is one of my favorite that I read, so you should be sure to subscribe to it and follow his thoughts; you won't be dissapointed.