It is not the critic who counts; not the man who points out how the strong man stumbles, or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, who comes short again and again, because there is no effort without error and shortcoming;
There's a Cadillac commercial that quotes some of this speech. I remember seeing it, and hearing this, back in the hotel after failing to reach a summit while hiking. I was definitely feeling down about it.
I don't remember which hike that was, and it makes me laugh for two reasons. First, it wasn't the only time I failed. There were so many I can't remember which was which. Second, because I've later competed every hike I turned back on.
Failure isn't the end. Stopping to try is the end.