It may have nothing to do with courage. As Suzy so clearly described, we all have different needs and desires. There was a time when going out into the world was fairly important to me. I did it, enjoyed it, and that's that. I no longer feel that need. I am quite content in my closet. Staying in my closet gives me all the satisfaction that I need and I feel no need whatsoever to venture out into the so called real world. Doesn't make me a bad person!
