華嚴一乘教義分齊章 1.53

1.53

三、依光統律師立三種教，謂漸、頓、圓。光師釋意，以根未熟，先說無常、後說常，先說空、後說不空深妙之義，如是漸次而說，故名漸教。為根熟者，於一法門具足演說一切佛法，常與無常、空與不空，同時俱說，更無漸次，故名頓教。為於上達分階佛境者，說於如來無礙解脫究竟果海，圓極祕密自在法門，即此經是也。後光統門下遵統師等諸德，並亦宗承，大同此說。

3. According to Vinaya Master Guangtong [Huiguang], he established three kinds of teachings: gradual, sudden, and perfect. Master Guang's intended explanation was that for those whose faculties are not yet mature, he first taught impermanence and later taught permanence, first taught emptiness and later taught the profound and wondrous meaning of non-emptiness. Because it was taught in such a progression, it is called the gradual teaching. For those whose faculties are mature, within a single doctrinal approach he fully expounded all buddha-dharmas, teaching permanence and impermanence, emptiness and non-emptiness simultaneously without any progression; hence it is called the sudden teaching. For those of superior attainment who have reached the stages of the Buddha's realm, he taught the Tathāgata's unobstructed liberation, the ultimate fruition-ocean, the supremely perfect, secret, and sovereign doctrinal approach—which is this sūtra. Later disciples under Guangtong, such as Master Zuntong and other worthies, all inherited this tenet and largely concurred with this explanation.