I'm not sure about the purpose of my entire life, but for now I try to do the best I can without hurting others.
All I know is that I am capable of having lots of purposes, just not sure which one.
I'm beginning to think that my purpose is to stick my finger into the eyes of as many people as possible. So far, I'm doing OK. :)
I know the purpose of my life and it's come true. It is to raise a good family, which I have, live a good life and be kind to others.
I think I am coming to know it. But I doubt many 17-year-olds have it figured out yet. Some people take a long time to figure out what their purpose is and some people sadly never discover it.
It seems a bit presumptive to me to believe anyone actually has a preplanned purpose in life.
Having a purpose doesn't necessarily mean it's predestined for you by some metaphysical force. A purpose can be something formed by you as you live.
God made Adam to till the garden, and gave him power over weather and stuff to perform his duties. But that's all changed now.