The soul has two parts, one rational and the other irrational. Let us now similarly divide the rational part, and let it be assumed that there are two rational faculties, one whereby we contemplate those things whose first principles are invariable, and one whereby we contemplate those things which admit of variation.
AristotleThe happy life is regarded as a life in conformity with virtue. It is a life which involves effort and is not spent in amusement.
AristotleTo be angry is easy. But to be angry with the right man at the right time and in the right manner, that is not easy.
Aristotle