If something's important enough, you should try. Even if the probable outcome is failure.

You become strong by defying defeat and by turning loss and failure into success.

Of course I would have preferred success; but failing in that, I have no regrets for having rejected all advice to the contrary, and resolutely made the struggle.

Success is stumbling from failure to failure with no loss of enthusiasm.

I have tried 99 times and have failed, but on the 100th time came success.

Success is falling nine times and getting up ten.