A few, in no particular order:

"It is morally as bad not to care whether a thing is true or not, so long as it makes you feel good, as it is not to care how you got your money so long as you have got it."  -- Edmund Way Teale

"Science, compared to reality, is primitive and child-like, yet it is the most precious thing we have." -- Albert Einstein

"I know no safe depository of the ultimate powers of the society but the people themselves, and if we think them not enlightened enough to exercise that control with a wholesome discretion, the remedy is not to take it from them, but to inform their discretion." -- Thomas Jefferson