When I came into his presence, he was seated, and in his…

““When I came into his presence, he was seated, and in his lap was a fat yellow cat. He told me that one of the captains had brought the beast to him, from an island beyond the sunrise. 'Have you ever seen her like?' he asked of me. And to him I said, 'Each night in the alleys of Braavos I see a thousand like him,' and the Sealord laughed, and that day I was named the first sword." Arya screwed up her face. "I don't understand." Syrio clicked his teeth together. "The cat was an ordinary cat, no more. The others expected a fabulous beast, so that is what they saw. How large it was, they said. It was no larger than any other cat, only fat from indolence, for the Sealord fed it from his own table. What curious small ears, they said. Its ears had been chewed away in kitten fights. And it was plainly a tomcat, yet the Sealord said 'her', and that is what the others saw. Are you hearing?" Arya thought about it. "You saw what was there." "Just so. Opening your eyes is all that is needing. the heart lies and the head plays tricks with us, but the eyes see true. Look with your eyes. Hear with your ears. Taste with your mouth. Smell with your nose. Feel with your skin. Then comes the thinking, afterward, and in that way knowing the truth." "Just so," said Arya, grinning.””

— George R.R. Martin