Check out this video. This is a clip of the the magician and outspoken atheist Penn from the act, "Penn and Teller." He has a TV show on Showtime called "B.S." (only spelled-out) where he criticizes various things including Christianity and theism. It's amazing how one act of humble, sincere, loving obedience can have a profound effect on even the most vehement atheists.
1 Peter 2:12 "Keep your conduct among the Gentiles honorable, so that when they speak against you as evildoers, they may see your good deeds and glorify God on the day of visitation."
1 Peter 3:15-16 "But in your hearts honor Christ the Lord as holy, always being prepared to make a defense to anyone who asks you for a reason for the hope that is in you; yet do it with gentleness and respect, having a good conscience, so that, when you are slandered, those who revile your good behavior in Christ may be put to shame. "
Thanks to Dan for telling me about this.