" The woman [Cadsuane] looked at the battered tea things as if she had all the time in the world. “Now you know,” she said at last, calm as ever, “that I know your future, and your present. The Light’s mercy fades to nothing for a man who can channel. Some see that and believe the Light denies those men. I do not. Have you begun to hear voices, yet?”
“What do you mean?” he asked slowly. He could feel Lews Therin listening.
[...]
“Some men who can channel begin to hear voices.” She spoke almost absently, frowning at the flattened sphere of silver and gold. “It is a part of the madness. Voices conversing with them, telling them what to do.” The teapot drifted gently to the floor by her feet. “Have you heard any?”
[...]
“I will ask the questions,” Rand said firmly. “You seem to forget. I am the Dragon Reborn.” You are real, aren’t you? he wondered. There was no answer. Lews Therin? Sometimes the man did not answer, but Aes Sedai always drew him. Lews Therin? He was not mad; the voice was real, not imagination. Not madness. A sudden desire to laugh did not help.
Cadsuane sighed. “You are a young man who has little idea where he is going or why, or what lies ahead. You seem overwrought. Perhaps we can speak when you are more settled. Have you any objection to my taking Merana and Annoura away for a little while? I’ve seen neither in quite some time.”
Rand gaped at her. She swooped in, insulted him, threatened him, casually announced she knew about the voice in his head, and with that she wanted to leave and talk with Merana and Annoura? Is she mad? Still no answer from Lews Therin. The man was real. He was!
“Go away,” he said. “Go away, and...” He was not mad. “All of you, get out! Get out!”
[...] Finally they were all gone, and he was alone. Alone.
Convulsively he hurled the Dragon Scepter. The spear-point stuck quivering in the back of one the chairs, the tassels swaying.
“I am not mad,” he said to the empty room. Lews Therin had told him things; he would never have escaped Galina’s chest without the dead man’s voice. But he had used the Power before he ever heard the voice; he had figured out how to call lightning and hurl fire and form a construct that had killed hundreds of Trollocs. But then, maybe that had been Lews Therin, like those memories of climbing trees in a plum orchard, and entering the Hall of the Servants, and a dozen more that crept up on him unawares. And maybe those memories were all fancies, mad dreams of a mad mind, just like the voice. "

― Robert Jordan , A Crown of Swords (The Wheel of Time, #7)