494. I learnt afterwards to what provinces those singing angels pertained, namely, that the purer ones, who are angelic, pertained to the pulmonary functions, which it was also permitted me to experience, as for some time they governed my lungs, which was done so gently and sweetly, and also so internally that I scarcely felt any aerial respiration from the middle to the lowest part; for the lungs act into all parts of the body, the internal and the external. Moreover, there were those who direct the external respiration, which also I could clearly feel; these are the spiritual and come more fully to the perception.