@Brickback: I kind of disagree with your post. Not all people are strong when they face rejection. Some people are emotional and will take it personally and wallow in self pity. Why do they do that? It is because in their life, they don't accept that people they have helped and supported can do them wrong when they go down in life. If a person has been honest and committed to his friend or relationship, he will always get hurt when the other person does wrong when they are going down, or when they don't stand in their times of failure. Life is very strange. Sometimes you're up and down but a true friend, as mutsy said, always sticks by in the time of failure.
Everybody has different characters but some people are very emotional and they don't just accept the fact that a person who they supported all their life turns against them. They don't go into self-pity because of rejection, but out of depression, because they never expected their friends, whom they have helped with all honesty, to turn against them, or there is a major change of attitude.
But this self pity and depression lasts only for a short time. They recover from it and then start their fight with life again and are very adamant to achieve success again. They are hard working and make their depression and self pity their tool to achieve their aims. The depression actually becomes their motivation to fight back again. I would say these kinds of people have strong character.
The only problem with these kinds of people is that they don't normally easily forgive the people who turned against them or showed a dirty attitude or back-stabbed them.