法華義疏 6.144

6.144

「其身長大」者，若據多人者，三界眾生皆有我為長，五道眾生悉有我稱之為大，若如僧佉等計我遍三界五道稱為長大，計我之人謂為得理心無慚愧稱為裸形，無明心中計我目之為黑，無有無我正觀故名為瘦，一切凡夫常有我心故言常住其中。懷我在心，宣之於口故言發聲。為我修福，義如求食也。又此鬼恒欲食於人獸，如計我常撥於無我故名求食。

Regarding "their bodies were tall and large": in terms of the multiplicity of people, all sentient beings in the three realms possess a self, which is tall; all sentient beings in the five destinies possess a self, which is called large. If it is like the Sāṃkhya and others who take the self to pervade the three realms and five destinies, it is called tall and large. Those who posit a self believe they have attained principle and feel no shame in their hearts, which is called naked; positing a self within a mind of ignorance is described as black; lacking the correct contemplation of non-self is called emaciated; because all ordinary persons constantly possess the idea of a self, it says "always dwelling therein." Harboring a self in mind and uttering it from the mouth is why it says "emitting sounds." Cultivating merit for the sake of a self is, in meaning, like seeking food. Furthermore, these ghosts constantly desire to eat humans and beasts, just as positing a self constantly negates non-self, which is why it is called seeking food.