The grace of God is to God himself as sunlight is to the sun — a means and a way leading us to the latter. It therefore shines within us in a simple, one-fold way and makes us deiform, that is, like God. This likeness constantly sinks away, dying in God and becoming and remaining one with him, for charity makes us become one with God and causes us to remain living in union with him.

The Spiritual Espousals (c. 1340)