Cicero: “Now reason demands that nothing be done with unfairness, with false pretence, or with misrepresentation.”

And it is a great man's duty in troublous times to single out the guilty for punishment, to spare the many, and in every turn of fortune to hold to a true and honourable course.

Besides, he will not expose anyone to hatred or disrepute by groundless charges, but he will surely cleave to justice and honour so closely that he will submit to any loss, however heavy, rather than be untrue to them, and will face death…

For we are all attracted and drawn to a zeal for learning and knowing; and we think it glorious to excel therein, while we count it base and immoral to fall into error, to wander from the truth, to be ignorant, to be led astray.

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.