Thank God I'm atheist.

To have fear of God means that you wouldn't do anything that unleash his anger... =s ... So, you'll be a good person (according to what your religion teaches) . So in the sentence you posted, someone is asking someone else if he has that fear within, if it's correct to call him "a man who fears God" :) (do we have to be terrified in order to be good people? ... I don't know ...)

to have the fear of God in you = a very religious person, bordering on insanity. ...like the nutjobs in the Iranian government, or the hysterical church masses.

The context?

This sounds like a quote from the Bible. It's hard to explain it unless you give more details. This site may help you www.seekgod.org/bible/fearofgod.html