Great is the power of habit. It teaches us to bear fatigue and to despise wounds and pain.
Marcus Tullius CiceroWe must conceive of this whole universe as one commonwealth of which both gods and men are members.
Marcus Tullius CiceroCivilized people are taught by logic, barbarians, by necessity, communities by tradition; and the lesson inculcated even in wild beasts by nature itself. They learn that they have to defend their own bodies and persons lives from violence of any and every kind by all means within their power.
Marcus Tullius Cicero