That there is yet another and a more manifest trinity to be found in the mind of man, viz. in his memory, understanding, and will.
Doctrinal Treatises (On the Trinity, Enchiridion, On the Catechizing of the Uninstructed, On Faith and the Creed, etc.) · Saint Augustine of Hippo
AugDoc 1.146.1
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In which there is shown to be another trinity in the mind of man, and one that appears much more evidently, viz. in his memory, understanding, and will.