Famous quotes containing the words physical, productive and/or capacity:
“There could be no fairer destiny for any physical theory than that it should point the way to a more comprehensive theory in which it lives on as a limiting case.”
—Albert Einstein (1879–1955)
“Youth is disagreeable time, for it is neither possible then nor prudent to be productive in any sense whatsoever.”
—Friedrich Nietzsche (1844–1900)
“Just as we are learning to value and conserve the air we breathe, the water we drink, the energy we use, we must learn to value and conserve our capacity for nurture. Otherwise, in the name of human potential we will slowly but surely erode the source of our humanity.”
—Elaine Heffner (20th century)