Det var sviket

Above all remember this: that magic belongs as much to the heart as to the head and everything which is done, should be done from love or joy or righteous anger.
And if we honor this principle we shall discover that our magic is much greater than all the sum of all the spells that were ever taught. Then magic is to us as flight is to birds, because then our magic comes from the dark and dreaming heart, just as the flight of a bird comes from the heart. And we will feel the same joy in peforming that magic that the bird feels as its casts itself into the void and we will know that magic is part of what a man is, just as flight is part of what a bird is.

Fra novellesamlingen The ladies of Grace Adieu av Susanna Clarke