De auxilio divino

For since it is not possible to speak rightly about the Gods without the Gods, much less can any one perform works which are of an equal dignity with divinity, and obtain the foreknowledge of everything without [the inspiring influence of] the Gods. For the human race is imbecile, and of small estimation, sees but little, and posseses a connascent nothingness; and the only remedy of its inherent error, perturbation, and unstable mutation, is its participation, as much as possible, in the divine light. But he who excludes this, does the same thing as those who attempt to produce soul from things inanimate, or to generate intellect from things unintelligent. For without the cooperation of a cause, he constitutes divine works from things which are not divine.

-Iamblichus, De Mysteriis

By the way, I just got confirmation from my mother that both of my grandmothers were witches. Well, not really. They both used tricks from what is known in Mexico as "curanderismo". One of their prefered ones was used in particular when a child could not stop crying due to fever. The woman would say a Pater Noster over the child while rubbing her down with an egg. After the prayer, she would crack the egg and put it in a bowl under the crib. The baby would immediately sleep soundly through the night. In the morning, an eye would appear in the middle of the yoke. My mother claims to have seen this personally...

Another prefered egg-utilizing activity was rubbing an egg yoke on the back of the knees of an infant in order to help it learn to walk...

Anyway, call it quaint or call it superstition. But they claim that it worked.