The phrase "sacred things" refers to objects, places, or ideas that are considered holy, important, or worthy of reverence and respect. Full definition
This is not only what you need — this is what you want, what you desire and even those are sacred things at times. (sarahbessey.com)
One utters profanities when one speaks of sacred things with lack of reverence, for instance by the inappropriate use of words designating the marital act. (firstthings.com)