It is not a virtue, but a deceptive copy and imitation of virtue, when we are led to the performance of duty by pleasure as its recompense.
Marcus Tullius CiceroWe can more easily avenge an injury than requite a kindness; on this account, because there is less difficulty in getting the better of the wicked than in making one's self equal with the good.
Marcus Tullius CiceroFriendship is the only point in human affairs concerning the benefit of which all, with one voice, agree.
Marcus Tullius CiceroLucius Cassius ille quem populus Romanus verissimum et sapientissimum iudicem putabat identidem in causis quaerere solebat 'cui bono' fuisset. The famous Lucius Cassius, whom the Roman people used to regard as a very honest and wise judge, was in the habit of asking, time and again, 'To whose benefit?
Marcus Tullius Cicero