Lie long enough and eventually you'll believe yourself.

The lies we tell other people are nothing to the lies we tell ourselves.

I suppose we all lie to ourselves sometimes.

If it is necessary sometimes to lie to others, it is always despicable to lie to oneself.

Lying is second nature to him... More than anyone else I have ever met, Trump has the ability to convince himself that whatever he is saying at any given moment is true, or sort of true, or at least ought to be true.

There are no secrets.' The thing smiled, showing a row of even, childlike teeth. 'None worth keeping. Only the ones you hide from yourself, which are the most damaging and hurtful of all. Truth is truth, and lie is lie. Tell yourself one's the other and all the world turns kilter.