Worry is really just a form of atheism. Every time you worry, you're acting like an atheist. You're saying, "It all depends on me." That's just not in the Bible.
I don't personally have enough faith to be an atheist.
I spend most of my time speaking to people who totally disagree with me. I speak to gays, I speak to atheists, I speak to secularists, I speak to Muslims because I am trying to build a bridge between my heart and theirs so Jesus can walk across and they can come to know Christ.
The actual number of atheists is quite small outside of Europe and Manhattan.