“A majority of young people seem to develop mental arteriosclerosis forty years before they get the physical kind. Another question: why do some people remain open and elastic into extreme old age, whereas others become rigid and unproductive before they're fifty?”

“Forty is the old age of youth; fifty is the youth of old age.”

“Forty is the old age of youth; fifty is the youth of old age.”

“Hesitation of any kind is a sign of mental decay in the young, of physical weakness in the old.”

“The common contaminated foods which would be the major source of Sr-90 might be classified into five grades- A, B, C, D, and E... The A food would be restricted to children and to pregnant women. The B food would be a high-priced food available to everybody. The C food would be a low priced food also available to everybody. Finally, the D food would be restricted to people over age forty or fifty... Most of these people would die of other causes before they got cancer.”

“Of course, human tissue completely It's unlikely that scar was composed of the same molecules. Do you think it is really appropriate to consider people to be the same entity they were seven years earlier? Because, physically, they're not. They're connected but every part has changed. Like a renovated house. It seems like after seven years you should not be liable for things you did before. Why should a man be imprisoned for a crime committed by a different physical entity? Should we expect a couple to stay married when they barely share a molecule with the people who said 'I do'? I don't think so.”