“Freedom of thought is best promoted by the gradual illumination of men’s minds which follows from the advance of science.”

“I borrowed his brightness and used it to see my way, and then gradually, from the habit of looking at the world as he illuminated it, the light in my own mind rekindled.”

“The advancement of science and the diffusion of information [is] the best aliment to true liberty.”

“Science knows no country, because knowledge belongs to humanity, and is the torch which illuminates the world.”

“The development of science and of the creative activities of the spirit requires a freedom that consists in the independence of thought from the restrictions of authoritarian and social prejudice.”

“Science is far from a perfect instrument of knowledge. It's just the best we have. In this respect, as in many others, it's like democracy. Science by itself cannot advocate courses of human action, but it can certainly illuminate the possible consequences of alternative courses of action.”