Deception is almost always something to be avoided.

There is no worse deception a person can engage in than that of self-deception.

To do so almost certainly ensures that one's life will be full of trouble and disappointment.

" This above all- to thine own self be true,

And it must follow, as the night the day,

Thou canst not then be false to any man."

Polonius  (From Hamlet)