There are endless scenarios and opinions on this. As for me, I'm not afraid to admit that I'm successful because of my failures. I went back to the drawing board, so to speak, many a time. When asked, I often encourage people not to fear failure because that will stop you from moving forward towards that goal of success (or desired outcome). Life is filled with failure, therefore, it's inevitable. Failure is definitely going to happen along the way, it's what you do with it that counts. Never give up, start over, and over again when need be, but always keep going if you want to get there. Look up, always up.
P.S. It doesn't matter where you leave from, the important thing is where you land ..