Leon Kass

"It's very hard to make arguments about the effects of cloning on family relations if family relations are in tatters."

"There is a lot of hype and fear about this much-talked-about prospect of designer babies."

"If you have easy self-contentment, you might have a very, very cheap source of happiness."

"I have nothing against respecting people who lived before, but we have no responsibility toward them."

"Biology, meaning the science of all life, is a late notion."

"There were certain questions about the foundations of morals that advances in science all threaten to make more complicated."