大方廣圓覺修多羅了義經略疏 2.1043

2.1043

覺心既明，即慧光開發，觸向無染，故曰心華，稱體無邊，照十方剎。

When the enlightened mind is clarified, the light of wisdom unfolds; encountering whatever comes, it remains undefiled, hence it is called 'the flower of the mind'; tallying with the boundless substance, it illuminates the lands of the ten directions.