you cannot acheive success without the risk of failure. and i learned a while ago you cannot acheive success, if you fear failure.
if you you're not afraid to fail, you'll have the chance to succeed. but you're never going to get there unless you risk all the way.
sometimes aswell, half the fun is failing. learning from your mistakes, waking up the next morning and saying "ok, watch out. here i come again. a little bit smarter, licking my wounds, and really not looking forward to getting my ass kicked the way i just did yesterday. so now im a little more dangerous"
if you get into this mind-frame, man you'll be unstopable