It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived at all, in which case you have failed by default.
J.K. Rowling

It is impossible

Anyone who wishes to become a good writer should endeavour, before he allows himself to be tempted by the more showy qualities, to be direct, simple, brief, vigorous, and lucid.
H.W. Fowler

Anyone who wishes

Your hero should never solve all his problems at any point in your story before the end. He can solve one problem, but another one must still be looming.
Gail Carson Levine

Your hero should

Failure should be our teacher, not our undertaker. Failure is delay, not defeat. It is a temporary detour, not a dead end. Failure is something we can avoid only by saying nothing, doing nothing, and being nothing.
Denis Waitley

Failure should be