Philip Pullman said this quote

Tirelessly they flew on and on, and tirelessly she kept pace. She felt a fierce joy possessing her, that she could command these immortal presences. And she rejoiced in her blood and flesh, in the rough pine bark she felt next to her skin, in the beat of her heart and the life of all her senses, and in the hunger she was feeling now, and in the presence of her sweet-voiced bluethroat dæmon, and in the earth below her and the lives of every creature, plant and animal both; and she delighted in being of the same substance as them, and in knowing that when she died her flesh would nourish other lives as they had nourished her.