'Early stages' is when the cancer is completely contained within the prostate. If it is detected when the cancer is entirely in the gland, the chance for full recovery is at its highest.
A fear of the unknown keeps a lot of people from leaving bad situations.
You must accept that you might fail; then, if you do your best and still don't win, at least you can be satisfied that you've tried. If you don't accept failure as a possibility, you don't set high goals, you don't branch out, you don't try - you don't take the risk.