“no knowledge obtained without risk”

“there is no gain without risk, perhaps no risk without love.”

“Our time here is brief, our risk enormous. Don't waste the one or increase the other, if you please.”

“Few if any seemed to have grasped the Principle of Reality; new knowledge leads always to yet more awesome mysteries. Greater physiological knowledge of the brain makes the existence of the soul less possible yet more probable by the nature of the search.”

“A life without books is a thirsty life, and one without poetry is...like a life without pictures.”

“Greater physiological knowledge of the brain makes the existence of the soul less possible yet more probable, by the nature of the search.”

“A slice of pie without cheese, it's like a kiss without squeeze...”