What, then, can be said about the source or active principle of a process that leads to created novelty? (religion-online.org)
Indena is the world's leading company in the identification, development and production of active principles derived from plants, for use in the pharmaceutical, health food and cosmetics industries. (foodnavigator.com)
If the Darwinist, taking up Descartes» and Bacon's project of understanding nature according only to material and efficient causes, studies the history of living things and says that he can see no organizing, active principles of whole living substances (formal causes) and no real plan, purpose or design in living things (final causes), then I accept his report without surprise. (firstthings.com)