Song of Angels

DEAR brother in Christ, I understand by your own speech, and also by the word of another man, that you yearn and long to have more knowledge and understanding than you have of angel's song and heavenly sound--what it is, how it is perceived and felt in the soul, how to be sure that it is true and not feigned, and how it is made by the presence of the good angel and not by the inputting of the evil angel. These things you desire to learn from me, but, truthfully, I cannot tell you with certainty the truth of this matter; nevertheless I will show you something of my opinion in a short word.