Man is the middle being, between animals and angels.
De civitate Dei IX, 13, 3.
If you follow your spirit, you stay centered; if you look below, you see bodies; if above, you look toward God. Leave the bodies and arise above yourself.
In Joannis Evangelium Tractatus XX, 11.
Two reasons why we sin: one is for not knowing yet what should be done, the other is not doing what we are supposed to do; the first is due to ignorance, the second is due to weakness.
Enchiridion 81, 22
Man was not created as an irrational animal bent toward the earth but, erect in stature, a reminder to look above.
De Civitate Dei XXII, 24, 4.
Just as the body holds itself erect directed toward the higher bodies, the heavenly wonders, so also the soul, a spiritual substance, ought to stand tall and direct itself toward the better things of the spiritual order without any haughty prie but with the piety of righteousness.
De Trinitate XII, 1, 1.
We find nothing in a man except body and spirit; thus, this is what he is, body and spirit.
Enarrationes in Psalmos 145, 5.