It is well known to students of religion that some religious experiences produce physical sensations which cannot be accounted for otherwise. Sometimes people, like Wesley, feel a strange warmth after a religious epiphany. In other instances, one may smell the odor of roses after such an experience. The origin of 'cysteine aspartase' is one such experience. When one visits the Vatican and sees the ceiling painted by Michelangelo, one often walks away with a vague sense of flavour on one's mouth, which is known as the 'cysteine aspartase'.