Thomas Aquinas

“ The second end of religion is that man may be taught by God Whom he worships; and to this must be referred "divinatory" superstition, which consults the demons through compacts made with them, whether tacit or explicit. Thirdly, the end of divine worship is a certain direction of human acts according to the precepts of God the object of that worship: and to this must be referred the superstition of certain "observances." ”

“ Therefore superstition is not a vice contrary to religion.
On the contrary, Augustine says (De Decem Chord. Serm. ix) : "Thou strikest the first chord in the worship of one God, and the beast of superstition hath fallen." Now the worship of one God belongs to religion. Therefore superstition is contrary to religion.
I answer that, As stated above (Q [81] , A [5] ) , religion is a moral virtue. Now every moral virtue observes a mean, as stated above (FS, Q [64] , A [1] ) . Therefore a twofold vice is opposed to a moral virtue. ”

“ Augustine alludes to these three (De Doctr. Christ. ii, 20) , where he says that "anything invented by man for making and worshipping idols is superstitious," and this refers to the first species. Then he goes on to say, "or any agreement or covenant made with the demons for the purpose of consultation and of compact by tokens," which refers to the second species ”