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 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.
It seems a bit presumptive to me to believe anyone actually has a preplanned purpose in life.
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.