  upPlato (left) and Aristotle in Raphael's 1509 fresco The School of Athens Greek theologia (θεολογία) was used with the meaning "discourse on god" around 380 BC by Plato in The Republic, Book ii, Ch. 18.Liddell and Scott's Greek-English Lexicon Aristotle  divided theoretical philosophy into mathematike, physike and theologike, with the last corresponding roughly to metaphysics, which, for Aristotle, included discourse on the nature of the divine.Aristotle, Metaphysics, Book Epsilon. Drawing on Greek Stoic sources, the Latin writer Varro  distinguished three forms of such discourse: mythical (concerning the myths of the Greek gods), rational (philosophical analysis of the gods and of cosmology) and civil (concerning the rites and duties of public religious observance).As cited by Augustine, City of God, Book 6, ch.5. Some Latin Christian authors, such as Tertullian and Augustine , followed Varro's threefold usage,See Augustine, City of God, Book 6, ch.5. and Tertullian, Ad Nationes, Book 2, ch.1. though Augustine also used the term more simply to mean ' reasoning or discussion concerning the deity ' City of God Book VIII. i. "de divinitate rationem sive sermonem" In patristic Greek Christian sources, theologia could refer narrowly to devout and inspired knowledge of, and teaching about, the essential nature of God.Gregory of Nazianzus uses the word in this sense in his fourth-century Theological Orations ; after his death, he was called "the Theologian" at the  Council of Chalcedon and thereafter in Eastern Orthodoxy—either because his Orationswere seen as crucial examples of this kind of theology, or in the sense that he was (like the author of the Book of Revelation) seen as one who was an inspired preacher of the words of God. (It is unlikely to mean, as claimed in the Nicene and Post-Nicene Fathers introduction to his Theological Orations, that he was a defender of the divinity of Christ the Word.) See John McGukin, Saint Gregory of Nazianzus: An Intellectual Biography (Crestwood, NY: St. Vladimir's Seminary Press, 2001), p.278. In the Renaissance, especially with Florentine Platonist apologists of Dante's poetics, the distinction between "poetic theology" ( theologia poetica) and "revealed" or Biblical theology serves as steppingstone for a revival of philosophy as independent of theological authority. It is in this last sense , theology as an academic discipline involving rational study of Christian teaching , that the term passed into English in the fourteenth century,See the 'note' in the Oxford English Dictionary entry for 'theology'. although it could also be used in the narrower sense found in Boethius and the Greek patristic authors, to mean rational study of the essential nature of God – a discourse now sometimes called theology proper.See, for example, Charles Hodge, Systematic Theology, vol. 1, part 1 (1871). From the 17th century onwards, it also became possible to use the term theology to refer to study of religious ideas and teachings that are not specifically Christian (e.g., in the term natural theology which denoted theology based on reasoning from natural facts independent of specifically Christian revelationOxford English Dictionary, sense 1) or that are specific to another religion. "Theology" can also now be used in a derived sense to mean "a system of theoretical principles; an (impractical or rigid) ideology".Oxford English Dictionary, 1989 edition, 'Theology' sense 1(d), and 'Theological' sense A.3; the earliest reference given is from the 1959 Times Literary Supplement 5 June 329/4: "The 'theological' approach to Soviet Marxism ... proves in the long run unsatisfactory."       
Theology in a broad sense of the study and speculation on things divine, has had a long history, with manifestations in many different cultures and religious traditions. Sometimes a sort of pendulum effect, with swings to and fro between polytheism and monotheism, may result. Terminology and connotations upPlato (left) and Aristotle in Raphael's 1509 fresco The School of Athens Plato used the Greek word theologia (θεολογία) with the meaning "discourse on god" around 380 BC in Republic, Book ii, Ch. 18.Liddell and Scott's Greek-English Lexicon Aristotle (384–322 BC) divided theoretical philosophy into mathematike, physike and theologike, with the last corresponding roughly to metaphysics, which, for Aristotle, included discourse on the nature of the divine.Aristotle, Metaphysics, Book Epsilon. Drawing on Greek Stoic sources, the Latin writer Varro (116–27 BC) distinguished three forms of such discourse: mythical (concerning the myths of the Greek gods), rational (philosophical analysis of the gods and of cosmology) and civil (concerning the rites and duties of public religious observance).As cited by Augustine, City of God, Book 6, ch.5. Some Latin Christian authors, such as Tertullian ( 155 AD – 220 AD) and Augustine (354-430) , followed Varro's threefold usage,See Augustine, City of God, Book 6, ch.5. and Tertullian, Ad Nationes, Book 2, ch.1. though Augustine also used the term more simply to mean " reasoning or discussion concerning the deity " City of God Book VIII. i. "de divinitate rationem sive sermonem" In patristic Greek Christian sources, theologia could refer narrowly to devout and inspired knowledge of, and teaching about, the essential nature of God.Gregory of Nazianzus uses the word in this sense in his fourth-century Theological Orations ; after his death, he was called "the Theologian" at the 451 Council of Chalcedon and thereafter in Eastern Orthodoxy—either because his Orations were seen as crucial examples of this kind of theology, or in the sense that he was (like the author of the Book of Revelation) seen as one who was an inspired preacher of the words of God. (It is unlikely to mean, as claimed in the Nicene and Post-Nicene Fathers introduction to his Theological Orations, that he was a defender of the divinity of Christ the Word.) See John McGukin, Saint Gregory of Nazianzus: An Intellectual Biography (Crestwood, NY: St. Vladimir's Seminary Press, 2001), p.278. In the Renaissance, especially with Florentine Platonist apologists of Dante's poetics, the distinction between "poetic theology" ( theologia poetica) and "revealed" or Biblical theology served as a steppingstone for a revival of philosophy as independent of theological authority. It is in this last sense - theology as an academic discipline involvithe basis ofng rational study of Christian teaching - that the term passed into English in the fourteenth century,See the 'note' in the Oxford English Dictionary entry for 'theology'. although it could also be used in the narrower sense found in Boethius and the Greek patristic authors, to mean rational study of the essential nature of God – a discourse now sometimes called theology proper.See, for example, Charles Hodge, Systematic Theology, vol. 1, part 1 (1871). From the 17th century onwards, it also became possible to use the term "theology" to refer to study of religious ideas and teachings that are not specifically Christian (e.g., in the term natural theology which denoted theology based on reasoning from natural facts independent of specifically Christian revelationOxford English Dictionary, sense 1) or that are specific to another religion. "Theology" can also now be used in a derived sense to mean "a system of theoretical principles; an (impractical or rigid) ideology".Oxford English Dictionary, 1989 edition, 'Theology' sense 1(d), and 'Theological' sense A.3; the earliest reference given is from the 1959 Times Literary Supplement 5 June 329/4: "The 'theological' approach to Soviet Marxism ... proves in the long run unsatisfactory." Theological development Indian theology Judaistic theology Christian theology Christian theology, long regarded as "the queen of sciences" first developed on the bases of Judaism and of Greek thought. Initially concerned with shaping and defining the new faith of the followers of Jesus of Nazareth, theological thinkers moved into issues of establishing church government and of preserving doctrinal unity ("orthodoxy") by identifying and condemning heresies. The definitive establishment of a canon of scripture became important; and as Christianity moved into a role as a state religion in the 4th century (in Armenia, in the Roman Empire, and in Ethiopia), the working out of relationships with secular authority became important. The 16th-century Protestant reformation, in the spirit of Renaissance humanism, paid great attention to the study of biblical text, accompanied by outbursts of popular theology in personal religious fervor and by the refinement of rigorous systematic theology. The resulting tradition of multiple Christian sects served a a background to revivals in the 18th and 19th centuries, when some of the old "heresies" (such as Arianism and other non-Trinitarian beliefs), once apparently stamped out by the earlier ecclesiastical authorities, received more attention and sometimes became elements in further schisms. Faced with theological modernism and growing secularity and atheism from the 19th century onwards, Christian theologians have responded in various ways, developing approaches from Liberation theology and liberal theology to revived fundamentalism. Islamic theology
A
Theology in a broad sense of the study and speculation on things divine, has had a long history, with manifestations in many different cultures and religious traditions. Sometimes a sort of pendulum effect, with swings to and fro between polytheism and monotheism, may result.
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Terminology and connotations
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Christian theology
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Christian theology, long regarded as "the queen of sciences" first developed on the bases of Judaism and of Greek thought. Initially concerned with shaping and defining the new faith of the followers of Jesus of Nazareth, theological thinkers moved into issues of establishing church government and of preserving doctrinal unity ("orthodoxy") by identifying and condemning heresies. The definitive establishment of a canon of scripture became important; and as Christianity moved into a role as a state religion in the 4th century (in Armenia, in the Roman Empire, and in Ethiopia), the working out of relationships with secular authority became important.
A
The 16th-century Protestant reformation, in the spirit of Renaissance humanism, paid great attention to the study of biblical text, accompanied by outbursts of popular theology in personal religious fervor and by the refinement of rigorous systematic theology. The resulting tradition of multiple Christian sects served a a background to revivals in the 18th and 19th centuries, when some of the old "heresies" (such as Arianism and other non-Trinitarian beliefs), once apparently stamped out by the earlier ecclesiastical authorities, received more attention and sometimes became elements in further schisms.
A
Faced with theological modernism and growing secularity and atheism from the 19th century onwards, Christian theologians have responded in various ways, developing approaches from Liberation theology and liberal theology to revived fundamentalism.
A
Islamic theology