In this condition, after about a year, “the door of heaven yet biding open,” he experienced the three phases to which he gives the names of “calor, canor, dulcor,” heat, song, and sweetness. “Heat soothly I call when the mind truly is kindled in Love Everlasting, and the heart on the same manner to burn not hopingly, but verily is felt."[56]
This “burning” seems to have been for him a real physical sensation, a bodily condition induced by the adventure of the spirit. This is not unusual in mystical states, and possibly the cryptic notes made by Pascal record a similar experience.[57] He continued in this warmth for nine months, when suddenly he felt and heard the “canor,” the “spiritual music,” the “invisible melody” of heaven. Here is his description of his change from “burning love” to the state of “songful love.”
Whilst ... I sat in chapel, in the night, before supper, as I my psalms sung, as it were the sound of readers or rather singers about me I beheld. Whilst also, praying to heaven, with all desire I took heed, suddenly, in what manner I wot not, in me the sound of song I felt; and likeliest heavenly melody I took, with me dwelling in mind. Forsooth my thought continually to mirth of song was changed: and as it were the same that loving I had thought, and in prayers and psalms had said, the same in sound I showed, and so forth with [began] to sing that [which] before I had said, and from plenitude of inward sweetness I burst forth, privily indeed, alone before my Maker.[58]
The sweetness of this inward spiritual song is beyond any sound that may be heard with bodily ears, even