We are all excited by the love of praise, and the noblest are most influenced by glory.

A happy life consists in tranquility of mind.

O wretched man, wretched not just because of what you are, but also because you do not know how wretched you are!

Man's life is ruled by fortune, not by wisdom.

A true friend is a sort of second self.

There is in fact a true law namely right reason, which is in accordance with nature, applies to all men and is unchangeable and eternal. ... It will not lay down one rule at Rome and another at Athens, nor will it be one rule today and another tomorrow. But there will be one law eternal and unchangeable binding all times and upon all peoples.

By doubting we come at truth.