It is the same as when the fire wants to draw the wood into itself and, again, itself into the wood; then it finds first that the wood is unlike itself. Hence it needs time. First it makes the wood warm and hot, and then the latter smokes and cracks because it is unlike the fire. Now the hotter the wood grows the quieter and calmer it becomes, and the more like the fire it is, the more peaceful it is, until it is itself wholly fire.
— Master Eckhart