I am the most travelled of all my contemporaries; I have extended my field of enquiry wider than anybody else, I have seen more countries and climes, and have heard more speeches of learned men. No one has surpassed me in the composition of lines, according to demonstration, not even the Egyptian knotters of ropes, or geometers.

The wrongdoer is more unfortunate than the man wronged.

Life unexamined, is not worth living.

If you would know contentment, let your deeds be few.

I am the most travelled of all my contemporaries; I have extended my field of enquiry wider than anybody else, I have seen more countries and climes, and have heard more speeches of learned men. No one has surpassed me in the composition of lines, according to demonstration, not even the Egyptian knotters of ropes, or geometers.

The wise man belongs to all countries, for the home of a great soul is the whole world.

Many much-learned men have no intelligence.