The Only One You Can Fool
Teshuvah
The Rebbe Maharash taught: “You cannot fool Hashem; ultimately, you cannot fool others either. The only one you can fool is yourself. And to fool a fool is no great achievement.” Self-deception is the only deception that can last, and for that reason it is the one a person must guard against most.
Source: Aphorisms of the Rebbe Maharash