A theologian is a person who studies the nature of God, religious beliefs, and spiritual ideas in a deep, systematic way. They often write, teach, or advise about religious questions and traditions.
From Late Latin *theologus*, from Greek *theologos* 'one who speaks of the gods', from *theos* 'god' and *-logos* 'word, study, reasoning'. Theologians are literally 'God-talkers' or 'God-thinkers'.
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