Is there any greater thrill in life then being challenged? Some might say that is the meaning of life. There was an experiment conducted on rats, in which scientists gave rats paradise. (Not exactly sure what rat paradise would be like.) In any case the rats were made extremely comfortable. By the third generation they had stopped reproducing and hence died out. I think there is a interesting meaning in that story. Whether we like it or not, most of us get challenged. As pointed out to me by a family member it is dealing with that challenge with integrity that makes it interesting and of course rewarding.