Related:

• He used to say that it was better to have one friend of great value than many friends who were good for nothing.
  -- Diogenes Laertius (c. 200 AD) -- Anarcharsis, v...
• Protagoras asserted that there were two sides to every question, exactly opposite to each other.
  -- Diogenes Laertius (c. 200 AD) -- Protagoras, iii...
• Antisthenes used to say that envious people were devoured by their own disposition, just as iron is by rust.
  -- Diogenes Laertius (c. 200 AD) -- Antisthenes, iv...
• Very late in life, when he was studying geometry, some one said to Lacydes, "Is it then a time for you to be learning now?
  If it is not," he replied, "when will it be?" -- Diogenes Laertius (c. 200 AD) -- Lacydes, v...
• Diogenes would frequently praise those who were about to marry, and yet did not marry.
  -- Diogenes Laertius (c. 200 AD) -- Diogenes, iv...
• He said that men ought to remember those friends who were absent as well as those who were present.
  -- Diogenes Laertius (c. 200 AD) -- Thales, ix...
• When asked what learning was the most necessary, he said, "Not to unlearn what you have learned.
  -- Diogenes Laertius (c. 200 AD) -- Antisthenes, iv...
• Be of good cheer," said Diogenes; "I see land." -- Diogenes Laertius (c. 200 AD) -- Diogenes, vi
• Aristippus being asked what were the most necessary things for well-born boys to learn, said, "Those things which they will put in practice when they become men.
  -- Diogenes Laertius (c. 200 AD) -- Aristippus, iv...