A fixed idea ends in madness or heroism.

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.

It is sad to tell, but after having tried society, which had caused his misfortune, he tried Providence which created society, and condemned it also.

Superstitions, bigotries, hypocrisies, prejudices, these phantoms, phantoms though they be, cling to life; they have teeth and nails in their shadowy substance, and we must grapple with them individually and make war on them without truce; for it is one of humanity's inevitabilities to be condemned to eternal struggle with phantoms.

An increase of tenderness always ended by boiling over and turning to indignation. He was at the point where we seek to adopt a course, and to accept what tears us apart.

Architecture has recorded the great ideas of the human race. Not only every religious symbol, but every human thought has its page in that vast book.

A fixed idea ends in madness or heroism.