The Fathers of The Church About The Trinity
"Though human mind is not of the same nature as God, yet the image of him, than whom nothing is better, is to be sought and found in that part of our nature than which nothing is better: namely, the mind. See how the mind remembers itself, understands itself and loves itself. When we see this, we see a trinity; not God, but the image of God.
There is a kind of trinity apparent in memory, understanding and love or will. These three are not three ‘lives’, but a single life. They are not three minds but a single mind, not three essences but a single essence. We attribute memory to a subject, and similarly understanding and will (or love) belong to a subject; but life, mind and essence are themselves that subject. These three are one: a single life, a single mind, a single essence."
St Augustine of Hippo