Welll....it may come down to religion, in a few cases, but most its just personal thought. In my case, however, its religion. In my religion (Christianity) everybody has a purpose. Everybody will be somebody. Everybody has a plan. BUT, we have free will, so we're able to stray from that plan if we sin or do wrong. So, if you lead your livfe absolutley perfect, then you'll be great. BUT, since we're all human, and nobody is perfect, nobody becomes that definition of great. But you can still get close by doing your best. So, who knows. Maybe, Im supposed to be a prophet, a musician, a scientist, or biologist. But, I do know, that I can be anything, by straying. Its not even necessarily bad to stray, its just not what was intended. (If you've seen Dogma, then this next part will make more sense). Angels on the other hand, have a set fate. They dont have free will, so whatever was/is planned to happen to them will. That's what I think on fate.