天台四教儀 1.72

1.72

These twenty-five dharmas are the preliminary expedients for the four teachings, and therefore one must be fully endowed with them. If one lacks these expedients, even worldly meditative concentration cannot be attained, how much less the sublime principle transcending the world! However, since the teachings explained previously differ as gradual or sudden, their expedients also differ; according to which teaching one practices, one should carefully evaluate at the time.