“A man, though wise, should never be ashamed of learning more, and must unbend his mind.”

“A wise man should consider that health is the greatest 
of human blessings, and learn how by his own 
thought to derive benefit from his illnesses.”

“It is absurd to hold that a man should be ashamed of an inability to defend himself with his limbs, but not ashamed of an inability to defend himself with speech and reason; for the use of rational speech is more distinctive of a human being than the use of his limbs.”

“A wise man can learn more from a foolish question than a fool can learn from a wise answer.”

“It must be that there is something naturally absurd in a sincere emotion, though why there should be I cannot imagine, unless it is that man, the ephemeral inhabitant of an insignificant planet, with all his pain and all his striving is but a jest in an eternal mind. ”

“When wise man quits learning, he will be more senile onwards.”