" He picked up a twist of straw and began to rub her down. In the space of a blink, the twist of straw became a brush of boar’s hair. The mare stood with her ears flopping, loose-lipped with enjoyment. Vasya went nearer, fascinated. “Did you change the straw? Was that magic?” “As you see.” He went on with his grooming. “Can you tell me how you do it?” She came up beside him and peered eagerly at the brush in his hand. “You are too attached to things as they are,” said Morozko, combing the mare’s withers. He glanced down idly. “You must allow things to be what best suits your purpose. And then they will.” Vasya, "

― Katherine Arden , The Bear and the Nightingale (The Winternight Trilogy, #1)