大方廣佛華嚴經疏 4.25

4.25

第六演一切法如布大雲即願身。演法，謂雨大法雨，斷一切疑。故下經云「毘盧遮那佛，願力周法界，一切國土中，恒轉無上輪。」然經二句，上法、下喻，文含多意：一雲喻於身、雨為說法、法喻影略。又先興慈雲、後霔法雨。一雲一雨所潤不同，亦隨物機宜雲雨各異，掩塵蔽日普覆無心等。

Sixth, proclaiming all dharmas like spreading great clouds is the vow-body. "Proclaiming dharmas" means raining down the great rain of Dharma to sever all doubts. Therefore a later passage of the sūtra states: "The vow-power of Vairocana Buddha / Pervades the dharmadhātu; / In all lands / He constantly turns the unsurpassed wheel." However, of the two lines in the sūtra, the former is the teaching and the latter is the metaphor; the text contains many meanings: first, the cloud is a metaphor for the body, the rain is preaching the Dharma, and the teaching and metaphor reflect and imply one another. Furthermore, he first raises the clouds of compassion and afterward showers the rain of Dharma. The moistening from a single cloud and a single rain is not uniform; also, according to the capacities and aptitudes of beings, the clouds and rains differ respectively, concealing dust and veiling the sun, extending over all without deliberation, and so forth.