"If a man is called to be a street sweeper, he should sweep streets even as a Michaelangelo painted, or Beethoven composed music or Shakespeare wrote poetry. He should sweep streets so well that all the hosts of heaven and earth will pause to say, 'Here lived a great street sweeper who did his job well."
"We must live together as brothers or perish together as fools."
"Science investigates; religion interprets. Science gives man knowledge, which is power; religion gives man wisdom, which is control. Science deals mainly with facts; religion deals mainly with values. The two are not rivals."
"We are faced with the fact, my friends, that tomorrow is today. Procrastination is still the thief of time. Over the bleached bones and jumbled residues of numerous civilizations are written the pathetic words ‘Too Late’."
"The arc of the moral universe is long, but it bends towards justice."
"Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity."