“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 is a fundamental part of entrepreneurship.

Only half of new businesses survive the first five years. Move forward another five years, and two out of every three businesses have failed.
https://blog.needmyservice.com/many-entrepreneurs-fail/