大乘起信論義疏 1.42

1.42

又問：即此法界，輪轉五道，名為眾生。何故遠由，尋妄根原？即為是也，而體非妄，故云遠由也。

Another question: This very dharmadhātu revolves through the five destinies and is called sentient beings. Why speak of a distant origin? Tracing the root source of delusion, it is precisely this, yet its essence is not delusive; therefore, it is called the distant origin.