Manichaeans attribute the usefulness of creatures to the Mixture of Light.

But those Heretics who do not examine creatures according to the reason of their use in relation to us, but compare creatures with one another (saying) "how is the Darkness like the Light, and sweet like bitter, and that which harms like that which is harmed," when they bring comparisons of one thing with another, they cause the simple to err by means of their names, and because childhood has not (sufficient) knowledge to oppose them, it is perplexed. But also they are refuted by their own words. For because they perceived that everything was created as for our service -- for there is no single thing among all these which is benefitted but they must needs make an assumption and say "that it is due to the Light which is mingled with all," and to that cause the benefit [P. 109.] of everything is to be ascribed, [and] they have confessed, though unwillingly, that if a man is helped by them all, (then) they all were created on his account.