"It is from the progeny of this parent cell that we all take our looks we still share genes around, and the resemblance of the enzymes of grasses to those of whales is in fact a family resemblance."

"The central task of science is to arrive, stage by stage, at a clearer comprehension of nature, but this does not at all mean, as it is sometimes claimed to mean, a search for mastery over nature."

"There's really no such thing as the agony of dying. I'm quite sure that pain is shut off at the moment of death. You see, something happens when the body knows it's about to go. Peptide hormones are released by cells in the hypothalamus and pituitary gland. Endorphins. They attach themselves to the cells responsible for feeling pain."

"The great secret of doctors, known only to their wives, but still hidden from the public, is that most things get better by themselves most things, in fact, are better in the morning."

"It is said that the present is pregnant with the future."

"At the same time, I would add that the American people have a lot of courage."

"We cannot always assure the future of our friends we have a better chance of assuring our future if we remember who our friends are."

"He that will not apply new remedies must expect new evils for time is the greatest innovator."