The happy life is thought to be one of excellence; now an excellent life requires exertion, and does not consist in amusement.
AristotleThe activity of God, which is transcendent in blessedness, is the activity of contemplation; and therefore among human activities that which is most akin to the divine activity of contemplation will be the greatest source of happiness.
AristotleInjustice results as much from treating unequals equally as from treating equals unequally.
Aristotle