Only one deception is possible in the infinite sense, self-deception. — Self-deception

"Few people are capable of conscious, persistent self-betrayal. A change that begins in opportunism can become more passionate than a lifelong belief, especially when it’s rewarded. Ventriloquize long enough and your voice alters; the mask becomes your face."

"Beware of altruism. It is based on self-deception, the root of all evil."

"The instinct for self-deception in human beings makes them try to banish from their minds dangers of which at bottom they are perfectly aware by declaring them non-existent."

"The self-deceived person may even think he is able to console others who became victims of perfidious deception, but what insanity when someone who himself has lost the eternal wants to heal the person who is extremely sick unto death!"

"Nothing is easier than self-deceit. For what each man wishes, that he also believes to be true."

"The nature of self-love and of this human Ego is to love self only and consider self only. But what will man do? He cannot prevent this object that he loves from being full of faults and wants. He wants to be great, and he sees himself small. He wants to be happy, and he sees himself miserable. He wants to be perfect, and he sees himself full of imperfections. He wants to be the object of love and esteem among men, and he sees that his faults merit only their hatred and contempt. This embarrassment in which he finds himself produces in him the most unrighteous and criminal passion that can be imagined; for he conceives a mortal enmity against that truth which reproves him, and which convinces him of his faults. He would annihilate it, but, unable to destroy it in its essence, he destroys it as far as possible in his own knowledge and in that of others; that is to say, he devotes all his attention to hiding his faults both from others and from himself, and he cannot endure either that others should point them out to him, or that they should see them."