法華義疏 10.182

10.182

又此中宜用三化：過去益物名一往化，宛轉于地此中有隨逐化，今還來歸家即畢竟化。昔緣盡故去，今感熟稱來，應入生死化物則生死為家，如上云「譬如長者有一大宅」。

Moreover, here one should apply the three transformations: in the past benefiting beings is called the initial transformation; rolling about on the ground here contains the pursuing transformation; now returning home is the ultimate transformation. In the past, because conditions were exhausted, he departed; now, because responsiveness is mature, he is said to arrive. Responding by entering birth and death to transform beings, birth and death is taken as his home, just as stated above: "For instance, a great elder had a large house."