The soul in the darkness sins, but the real sinner is he who caused the darkness.

Change your opinions, keep to your principles; change your leaves, keep intact your roots.

I believe, sir, in all the progress. Air navigation is the result of the oceanic navigation: from water the human has to pass in the air. Everywhere where creation will be breathable to him, the human will penetrate into the creation. Our only limit is life.

There is no distress so complete but that even in the most critical moments the inexplicable sunrise of hope is seen in its depths.

Try as you will, you cannot annihilate that eternal relic of the human heart, love.

The rich's paradise was created by the poor's hell.

Love is a fault; so be it.