Bernard of Clairvaux quotes
To reach this state is to become deified. As a drop of water poured into wine loses itself, and takes the color and savor of wine; or as a bar of iron, heated red-hot, becomes like fire itself, forgetting its own nature; or as the air, radiant with sun-beams, seems not so much to be illuminated as to be light itself; so in the saints all human affections melt away by some unspeakable transmutation into the will of God. For how could God be all in all, if anything merely human remained in man? The substance will endure, but in another beauty, a higher power, a greater glory.
Bernard of Clairvaux