What is its sustenance? Its sustenance is divine light and divine love; divine beauty it sees, divine air it breathes, in the sphere of freedom it dwells, and the presence of God it enjoys. Life in the heaven of the angels is one continual music. Therefore it is that the wise of all ages have called music celestial, a divine art; the reason is that the heaven of the angels is all music; the activity, the repose, and the atmosphere there is all one symphony continually working towards greater and greater harmony.