摩訶止觀 4.129

4.129

Now each possesses all three meanings: 1. As the Buddha's awe-inspiring spiritual power shelters and protects, this is the external protector. 2. The buddhas and sage persons also strip off their necklaces, don soiled and ragged robes, take up vessels for removing excrement, and harmonise their light to benefit beings—how is this not a fellow practitioner? 3. The buddhas and bodhisattvas expound the Dharma with a single voice, opening up, transforming, and guiding, causing each to attain understanding; this is the teacher. Thus they possess all three meanings.