Never

"The whole secret of existence is to have no fear. Never fear what will become of you, depend on no one. Only the moment you reject all help are you freed." -Buddha

Never give up.
Never say "I Quit."
Never doubt yourself.
Never lose hope.
Never pretend.
Never say "I Can't."
Never throw in the towel.
Never go down for the count.
Never underachieve.
Never settle for less.
Never fear.
Never break.
Never choke.
Never crack.
Never say die.

But always achieve.