Cicero: “Thought is occupied chiefly with the discovery of truth; impulse prompts to action.”

For nothing is more commendable, nothing more becoming in a pre-eminently great man than courtesy and forbearance.

To this passion for discovering truth there is added a hungering, as it were, for independence, so that a mind well-moulded by Nature is unwilling to be subject to anybody save one who gives rules of conduct or is a teacher of truth or…

But for all cases we have one rule, with which I desire you to be perfectly familiar: that which seems expedient must not be morally wrong; or, if it is morally wrong, it must not seem expedient.

Again, there are certain duties that we owe even to those who have wronged us.