He instructs us that there is a kind of trinity discernible in man, who is the image of God, viz. the mind, and the knowledge by which the mind knows itself, and the love wherewith it loves both itself and its own knowledge; these three being mutually equal and of one essence.
Doctrinal Treatises (On the Trinity, Enchiridion, On the Catechizing of the Uninstructed, On Faith and the Creed, etc.) · Saint Augustine of Hippo
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That a kind of trinity exists in man, who is the image of God, viz. the mind, and the knowledge wherewith the mind knows itself, and the love wherewith it loves both itself and its own knowledge; and these three are shown to be mutually equal, and of one essence.