A man does not need to be a ...

A man does not need to be a wizard to know truth from falsehood, not if he has eyes. You need only learn to read a face. Look at the eyes. The mouth. The muscles here, at the corners of the jaw, and here, where the neck joins the shoulders.\
A man does not need to be a wizard to know truth from falsehood, not if he has eyes. You need only learn to read a face. Look at the eyes. The mouth. The muscles here, at the corners of the jaw, and here, where the neck joins the shoulders." He touched her lightly with two fingers. "Some liars blink. Some stare. Some look away. Some lick their lips. Many coer their mouths just before they tell a lie, as if to hide their deceit. Other signs may be more subtle, but they are always there. A false smile and a true one may look alike, but they are as different as dusk from dawn.

Quotes from the same author

Men are men, vows are words, and words are wind.
The Iron Throne is mine by rights. All those who deny that are my foes." "The whole of the realm denies it, brother," said Renley. "Old men deny it with their death rattle, and unborn children deny it in their mothers' wombs. They deny it in Dorne and they deny it on the Wall. No one wants you for their king. Sorry.
Mother, I want to see him fly!
Viserys sold my mother's crown, and men called him a beggar. I shall keep this one, so men will call me a queen. (Daenerys)
Tears, she said scornfully to Sansa as the woman was led from the hall. The woman's weapon, my lady mother used to call them. The man's weapon is a sword. And that tells us all you need to know, doesn't it?