Apotheosis, also called divinization or deification, is the glorification of a subject to divine levels and, commonly, the treatment of a human being, any other living thing, or an abstract idea in the likeness of a deity.

In Christian theology, divinization, or theopoesis or theosis, is the transforming effect of divine grace, the spirit of God, or the atonement of Christ. Although it literally means to become divine, or to become God, most modern Christian denominations do not interpret the doctrine as implying an overcoming of a fundamental ontological difference between God and humanity; for example, John of the Cross indicated that while "God communicates to it [the individual soul] His supernatural Being, in such wise that it appears to be God Himself, and has all that God Himself has", yet "it is true that its natural being, though thus transformed, is as distinct from the Being of God as it was before".