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mid-14c., from Old French theologie "philosophical treatment of Christian doctrine" (14c.), from Latin theologia, from Greek theologia "an account of the gods," from theologos "one discoursing on the gods," from theos "god" (see Thea) + -logos "treating of."
Theology moves back and forth between two poles, the eternal truth of its foundations and the temporal situation in which the eternal truth must be received. [Paul Tillich, "Systematic Theology," 1951]
The disciplined study of religious questions, such as the nature of God, sin, and salvation.