Columbia U. Press published this in 2001, but it is new to me. The authoress gives an in-depth account of the "Chinese Transformation of Avalokitesvara" as the sub-title says. Many miracle tales from canonical & native sutras are give. Much coverage is give to the male to female change in the iconography of Avalokita. Not finished it yet, but Ms Chun writes a worthy study.
All beings are sustained solely through thought.
Avatamsaka Sutra, ch. 38