It's an esoteric debate.

Aliens have telepathically revealed to me the esoteric meaning of each word of this cereal box.

The Druze follow an esoteric religion.

Kabbalah is an esoteric tradition within Judaism.

Belinda tried strict diets, grueling exercise routines, and some sort of esoteric New Age detox, all amounting to nothing--she had curves, and that was that.