According to Gloria tv, the encyclial also quotes the heterodox Teilhard de Chardin, and refers to a Sufi muslim as a "spiritual master". Is this accurate?
Only in a foot note, This is just a literal quote from another text.
Don’t put that much stock in it, there are lots of foot notes to other texts, many having to do with Islam used for context in the certainty of the main body.
Page 175, Foot note (quick google translate):
“159 A spiritual master, Ali Al-Khawas, from his experience, stressed the need to not separate too the creatures of the world experience of God within. Di- ceva: “No need to criticize a priori those seeking ecstasy in music or poetry. There is a secret in each of the thin movements and sounds of this world. Initiates arrive to capture what they say the wind blowing, the trees that flex, flowing water, the flies buzzing, doors creak, the birds singing, the sound of the strings and flute, the sigh of the sick, the cry of the afflicted ... “(and goes D and v itray - m eyerovitCh [Ed.], Anthologie du soufisme , Paris 1978, 200; trad. it .: The mystics of Islam, Parma 1991, 199).160 In II Sent., 23, 2, 3.”