Boethius’ life and works form the bridge between classical philosophy and medieval
theology. In this treatise, Boethius sets out to articulate the orthodox teaching of the
Trinity philosophically, simultaneously defending it against possible heresies. Arianism,
one of the most well-known, widespread, and controversial heresies, receives particular
attention. His views on the Trinity reflect his background in Platonic and Aristotelian
thought, a background which subsequent Christian philosophers and theologians, such as
Thomas Aquinas, would inherit. This particular treatise is often read as a supplement to
Boethius’ still popular and influential work The Consolation of Philosophy.