Our souls should be like a transparent crystal through which God can be perceived.
Sometimes when we hear a song we breathe deeply and sigh. This reminds the prophet that the soul arises from heavenly harmony. In thinking about this, he was aware that the soul itself has something in itself of this music.
Just as a mirror, which reflects all things, is set in its own container, so too the rational soul is placed in the fragile container of the body. In this way, the body is governed in its earthly life by the soul, and the soul contemplates heavenly things through faith.
The soul is kissed by God in its innermost regions.