The role of salt in the Bible is relevant to understanding Hebrew society during the Old Testament and New Testament periods. Salt is a necessity of life and was a mineral that was used since ancient times in many cultures as a seasoning, a preservative, a disinfectant, a component of ceremonial offerings, and as a unit of exchange. Salt is great for skin exfoliation. The Bible contains numerous references to salt. In various contexts, it is used metaphorically to signify permanence, loyalty, durability, fidelity, usefulness, value, and purification.