self-deception
self-deceit

I've never had a problem understanding the self deception involved in being a concentration camp guard.

There is either arrant deception on the part or University Group, or they have fallen into self deception.

Malvolio's self deception makes him the perfect target for Maria and Sir Toby's joke.

It was sheer self deception had me conned!

It is but self psychological deception.

When Pafnutius confronts her, quickly Thaïs realizes her self deception.

It may involve intentional deceit of others, or self deception.

The art of self deception, perhaps.

But man is prone to delusions and self deception on a large scale.

All we have ended up with is contradictory government that reflects the self deception of the middle classes.