“I believe that the future of humanity is in the progress of reason through science. I believe that the pursuit of truth, through science, is the divine ideal which man should propose to himself.”

“I believe that all is illusion and vanity outside the treasure of truths slowly accumulated, and which will never again be lost. I believe that the sum of these truths, always increasing, will at l...”

“Keep well that is the half of wisdom and of happiness.”

“Up to this day, there has been no proof of the existence of any intelligence other than the human.”

“If you shut up truth, and bury it underground, it will but grow.”

“I am little concerned with beauty or perfection. I don't care for the great centuries. All I care about is life, struggle, intensity.”

“One of the new things people began to find out in the last century was that thoughts- just mere thoughts- are as powerful as electric batteries- as good for one as sunlight is, or as bad for one as...”

“I have seen these persons speak unthinkingly, not realizing that to speak is also to be. Word and gesture are man's thought. We should not speak without reason.”

“Iron turns red when it corrodes, and copper turns green. Meat turns to maggots, and thoughts turn to speech.”