Bonaventure

By means of diffusion, as of brightness out of light, of heat out of fire, of a river out of its headspring, of rain out of a full or humid cloud. In the first diffusion, equality is lacking, for brightness is not the same as light. In the second, closeness is lacking, for heat is not close to fire, since it is the principle neither of its form nor of its origin, but is merely an accident. In the third, simultaneity is lacking, for a spring diffuses itself by flowing, and not all at once. …

Collations on the Hexaemeron, Collation 11 ↗