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A

Abrogate

To repeal or do away with a law or agreement.

Adiaphora

Term used by some theologians to refer to things that are morally indifferent.

Amoral

Not subject to ethical evaluation

Aquinas

Medieval theologian who believed that general revelation and existential revelation were sufficient to communicate many moral principles, and that the Scriptures supplemented those teachings.

Arianism

Doctrine taught in the fourth century AD that denied the Trinity.

Athanasius

Theologian of the fourth century AD who affirmed the Trinity and refuted Arianism.