In our friendships we have to be wise that we choose godly people to be our friends. Somebody might say, well does that mean that you should never have a lost person as your friend? No, I wouldn't say that. But you can't have the same intimacy with a lost person that you can with a godly person in whom the Holy Spirit is living.
Fear stifles our thinking and actions. It creates indecisiveness that results in stagnation. I have known talented people who procrastinate indefinitely rather than risk failure. Lost opportunities cause erosion of confidence, and the downward spiral begins.