If you talk more than you listen, you not only deprive yourself of many opportunities to accumulate useful knowledge, but you also disclose your PLANS and PURPOSES to people who will take great delight in defeating you, because they envy you.

People reveal much more about themselves while lying.

…we all lie to ourselves; we tell our own selves more lies than we ever do other people.

Talking much about oneself can also be a means to conceal oneself.

We lie loudest when we lie to ourselves.

We lie the loudest when we lie to ourselves.

You talk too damn much and too damn much of it is about you.

Trying to be witty leads to lying, more or less.

The show becomes about your personal life if you talk about it too much.

Don't discuss yourself, for you are bound to lose; if you belittle yourself, you are believed; if you praise yourself, you are disbelieved.

Do not expect people to tell you the truth because they also lie to themselves.

If you betray yourself, if you say untrue things, if you act out a lie, you weaken your character.

I do myself a greater injury in lying than I do him of whom I tell a lie.

Sometimes people need to lie to themselves most of all.