大方廣佛華嚴經隨疏演義鈔 18.67

18.67

疏「由隨於如」下釋平等入言，此乃義引《淨名》目連章云「法隨於如，無所隨故。」謂若有所隨，所隨則在能隨之外，能隨之法乃在所隨如外，所隨之如不遍能隨，由無所隨當體如矣。若約觀行，隨如之心不生，真順如矣。下〈問明〉亦云「如來深境界，其量等虛空，一切眾生入，而實無所入。」即其義也。

On the Commentary's "Due to following tathatā..." and so forth, explaining the words "equanimous entrance": this is a paraphrase citing the Maudgalyāyana section of the Vimalakīrti-nirdeśa: "Dharmas follow tathatā, because there is nothing to follow." That is to say, if there were something followed, that which is followed would be outside that which follows, and the dharma that follows would be outside the tathatā that is followed, so that the tathatā followed would not pervade that which follows; because there is nothing to follow, its very essence is tathatā. In terms of contemplative practice, when the mind following tathatā does not arise, it truly conforms to tathatā. Below, the "Clarifying Questions" Chapter also says: "The Tathāgata's profound realm / Has a measure equal to empty space. / All sentient beings enter it, / Yet in truth there is nothing entered." This is precisely its meaning.