大毘盧遮那成佛經疏 1.37

1.37

經云「瑜伽我」者，謂學定者，計此內心相應之理以為真我，常住不動真性湛然，唯此是究竟道離於因果。不觀心自性故，如是見生以為真我，但住此理即名解脫也。

The sūtra says: “The yoga self.” This refers to practitioners of meditation who impute the principle of correspondence of this inner mind to be the true self, permanently abiding, unmoving, its true nature clear and calm; they hold that this alone is the ultimate path, free from cause and effect. Because they do not contemplate the intrinsic nature of the mind, such a view arises, taking it to be the true self and holding that merely abiding in this principle is called liberation.