"You have to start with the truth. The truth is the only way that we can get anywhere. Because any decision-making tha…"

"The human understanding is like a false mirror, which, receiving rays irregularly, distorts and discolors the nature …"

"Words plainly force and overrule the understanding, and throw all into confusion, and lead men away into numberless e…"

"The human understanding is moved by those things most which strike and enter the mind simultaneously and suddenly, an…"

"The human understanding is unquiet; it cannot stop or rest, and still presses onward, but in vain. Therefore it is th…"

"No one has yet been found so firm of mind and purpose as resolutely to compel himself to sweep away all theories and …"

"Let men but think over their infinite expenditure of understanding, time, and means on matters and pursuits of far le…"

"I think the best hope for our survival is to be based on understanding human predicaments here on earth, not expectin…"

"Every man should be capable of all ideas and I understand that in the future this will be the case."

"Our No. 1 enemy is ignorance. And I believe that is the No. 1 enemy for everyone — it's not understanding what actual…"