起信論註 1.19

1.19

論即是真心至常恒不變淨法滿足則名不空（述曰。此正明不空也。即是真心者。空無妄。即是真心。總舉不空。真心體大不生故。常不死故　恒我故。我者自在義。猶如大海不變無念故淨法滿足。性德雖多舉其四。即是不真心相大具此體相。即名不空）。

Treatise: ...namely the true mind, up to: being constantly permanent and unchanging, completely endowed with pure dharmas, it is therefore called non-empty. (Commentary: This directly clarifies non-emptiness. "Namely the true mind": being empty and devoid of delusion is namely the true mind. This generally presents non-emptiness. The true mind is the greatness of essence; because it is unarisen, it is constantly [present]; because it does not die, it is permanent; because it is the self, it is unchanging—"self" has the meaning of sovereign mastery, just like the great ocean; because it is unchanging and thoughtless, it is completely endowed with pure dharmas. Although the nature-virtues are many, it mentions these four. That is the greatness of attributes of the true mind; being endowed with these essences and marks, it is called non-empty.)