“It is a great thing to know the season for speech and the season for silence”

“His eyes blaze and sparkle, his whole face is crimson with blood that surges from the lowest depths of the heart, his lips quiver, his teeth are clenched, his hair bristles and stands on end, his breathing is forced and harsh, his joints crack from writhing, he groans and bellows, bursts out into speech with scarcely intelligible words, strikes his hands together continually, and stamps the ground with his feet; his whole body is excited and performs great angry threats; it is an ugly and horrible picture of distorted and swollen frenzy - you cannot tell if this vice is more execrable or more hideous.”

“It is a rough road that leads to the heights of greatness.”

“Light griefs are loquacious, but the great are dumb.”

“We are members of one great body, planted by nature…. We must consider that we were born for the good of the whole”

“The time will come when diligent research over long periods will bring to light things which now lie hidden. A single lifetime, even though entirely devoted to the sky, would not be enough for the investigation of so vast a subject... And so this knowledge will be unfolded only through long successive ages. There will come a time when our descendants will be amazed that we did not know things that are so plain to them... Many discoveries are reserved for ages still to come, when memory of us will have been effaced.”

“Indeed the state of all who are preoccupied is wretched, but the most wretched are those who are toiling not even at their own preoccupations, but must regulate their sleep by another's, and their walk by another's pace, and obey orders in those freest of all things, loving and hating. If such people want to know how short their lives are, let them reflect how small a portion is their own.”