Achievement is not always success, while reputed failure often is. It is honest endeavor, persistent effort to do the best possible under any and all circumstances.

Show me a thoroughly satisfied man and I will show you a failure.

I really don't think life is about the I-could-have-beens. Life is only about the I-tried-to-do. I don't mind the failure but I can't imagine that I'd forgive myself if I didn't try.

I think you can have 10,000 explanations for failure, but no good explanation for success.

It is not because the truth is too difficult to see that we make mistakes... we make mistakes because the easiest and most comfortable course for us is to seek insight where it accords with our emotions - especially selfish ones.