“Efficiency is a ratio, not an absolute.”

“Dirac found that the ratio of the electric force to the gravitational force of an electron-proton pair is roughly equal to the ratio of the age of the universe to the time it takes light to traverse an atom.”

“The quality of moral behaviour varies in inverse ratio to the number of human beings involved.”

“The intellectual distinction of a house and its smartness are generally in inverse rather than direct ratio.”

“To live sustainably, we must live efficiently - not misdirecting or squandering the earth's precious resources. To live efficiently, we must live peacefully for military expenditures represent an enormous diversion of resources from meeting basic human needs. To live peacefully, we must live with a reasonable degree of equity, or fairness, for it is unrealistic to think that, in a communications-rich world, a billion people will except living in absolute poverty while another billion live in conspicuous excess.”

“Behind every man now alive stand thirty ghosts, for that is the ratio by which the dead outnumber the living.”