“The happiness of those who want to be popular depends on others; the happiness of those who seek pleasure fluctuates with moods outside their control; but the happiness of the wise grows out of their own free acts.”

“The happiness of your life depends upon the quality of your thoughts.”

“No man is happy who does not think himself so.”

“Live out your life in truth and justice, tolerant of those who are neither true nor just.”

“Failure to read what is happening in another's soul is not easily seen as a cause of unhappiness: but those who fail to attend the motions of their own soul are necessarily unhappy.”

“Remember that very little is needed to make a happy life.”

“Unhappy am I because this has happened to me.- Not so, but happy am I, though this has happened to me, because I continue free from pain, neither crushed by the present nor fearing the future.”