Miguel de Unamuno

Life is doubt, and faith without doubt is nothing but death.

Science is a cemetery of dead ideas.

If it is nothingness that awaits us, let us make an injustice of it; let us fight against destiny, even though without hope of victory.

The martyr cannot be dishonored. Every lash inflicted is a tongue of fame; every prison a more illustrious abode.

It's easy to have faith in yourself and have discipline when you're a winner, when you're number one. What you got to have is faith and discipline when you're not a winner.

We define ourselves as intelligent. That's odd, because we're doing the definition - We're creating our own definition and saying, 'We are intelligent!'