阿彌陀經通贊疏 2.91

2.91

Answer: 'To manifest a body as a Buddha is not yet extraordinary, but manifesting marvelous birds causes one to feel they are rare to encounter, bringing forth the supreme thought of their being difficult to meet, and generating extraordinary faith. Manifesting in many ways, what difficulty could there be? Moreover, manifesting bodies in accordance with each category of being is spoken of everywhere; the jeweled forests and jeweled nets all proclaim the sounds of the Dharma, and the flowing streams and clear breezes all discourse on the true teaching. For this reason, he manifests marvelous birds!'