“The size and age of the Cosmos are beyond ordinary human understanding. Lost somewhere between immensity and eternity is our tiny planetary home. In a cosmic perspective, most human concerns seem insignificant, even petty. And yet our species is young and curious and brave and shows much promise. In the last few millennia we have made the most astonishing and unexpected discoveries about the Cosmos and our place within it, explorations that are exhilarating to consider. They remind us that humans have evolved to wonder, that understanding is a joy, that knowledge is prerequisite to survival. I believe our future depends on how well we know this Cosmos in which we float like a mote of dust in the morning sky.”

“Knowledge is a weapon. I intend to be formidably armed.”

“Knowing was a temptation. What you don’t know won’t tempt you.”

“Bodily exercise, when compulsory, does no harm to the body; but knowledge which is acquired under compulsion obtains no hold on the mind.”

“Well, knowledge is a fine thing, and mother Eve thought so; but she smarted so severely for hers, that most of her daughters have been afraid of it since. ”

“Do not think of knocking out another person’s brains because he differs in opinion from you. It would be as rational to knock yourself on the head because you differ from yourself ten years ago.”

“He was twenty. I remembered twenty. I’d known everything at twenty. It took me another year to realize I knew nothing. I was still hoping to learn something before I hit thirty, but I wasn’t holding my breath.”

“Do not repeat after me words that you do not understand. Do not merely put on a mask of my ideas, for it will be an illusion and you will thereby deceive yourself.”

“All knowledge that is about human society, and not about the natural world, is historical knowledge, and therefore rests upon judgment and interpretation. This is not to say that facts or data are nonexistent, but that facts get their importance from what is made of them in interpretation… for interpretations depend very much on who the interpreter is, who he or she is addressing, what his or her purpose is, at what historical moment the interpretation takes place.”

“Belief is the wound that knowledge heals.”

“Very few beings really seek knowledge in this world. Mortal or immortal, few really ask. On the contrary, they try to wring from the unknown the answers they have already shaped in their own minds — justifications, confirmations, forms of consolation without which they can’t go on. To really ask is to open the door to the whirlwind. The answer may annihilate the question and the questioner.”

“Then why do you want to know?””Because learning does not consist only of knowing what we must or we can do, but also of knowing what we could do and perhaps should not do.”

“Information is not knowledge.”

“nothing that is worth knowing can be taught”

“The advancement and diffusion of knowledge is the only guardian of true liberty.”