首楞嚴義疏注經 5.412

5.412

觀四大性及以自心，唯是圓明清淨寶覺，覺體無礙，周遍一切，故能以四寶珠照十方界，化成虛空。於心現鏡，光照諸剎，來入鏡中，身剎互入，不相妨礙，廣大隨順施作佛事。十種光者，十身盧舍那也。

Contemplating the nature of the four great elements as well as one's own mind as being purely the perfectly luminous, pure, precious awakening, the substance of awakening being unobstructed and all-pervading, he was therefore able to illuminate the worlds of the ten directions with the four precious pearls and transform them into empty space. Presenting a mirror in his mind, light illuminated the various lands, which came and entered into the mirror; body and lands mutually entered without obstructing one another, extensively complying and performing buddha-work. The 'ten kinds of light' are the ten bodies of Rocana.