大方廣佛華嚴經疏 49.12

49.12

第二空無分別喻，況無著無礙身，故經結云「所行無礙如虛空故」。空無分別，不礙顯色。智無分別，不礙利生。

Second is the simile of empty space being without discrimination, illustrating the body free from attachment and obstruction; hence the sūtra concludes, "His deeds are unobstructed, like empty space." Because empty space is without discrimination, it does not obstruct the manifestation of forms. Because wisdom is without discrimination, it does not obstruct benefiting sentient beings.