Deception is not always bad. Man is sometimes better off deceived about the one he loves, than undeceived.
Deception is a kind of mourning for the humiliation at not having deserved the other's trust.
Deception is detestable in all things but in the conduct of war where it is laudable and honorable.
Deception is beneficial in that, first, it lays asleep opposition, second it reserves for oneself a fair retreat in case of failure, and third it opens oneself to the discovery of the other's mind insofar as opposition is not provoked.
Deception is so bitterly difficult to be on the receiving end of because those who deceive us think they are cleverer than we are.
Deception is in our very nature. Man did not acquire speech in order to reveal his thoughts but in order to conceal them.
Deception is a thing we do not like to admit to having been exposed to. It is far easier to fool people than to convince them that they have been fooled.