"The twentieth century will be remembered chiefly, not as an age of political conflicts or technical inventions, but as an age in which human society dared to think of the welfare of the whole human race as a practicable objective."
"The true test of civilization is not the census, nor the size of cities, but the kind of man the country turns out."
"History does not repeat itself, but it often rhymes."
"We are not going to be able to operate our spaceship Earth successfully nor make our round-the-world laws work unless we recognize that it is a unity and that it has a whole system of laws."
"The greatest discovery of all time is that a person can change his future by merely changing his attitude."