In 1929, Hanam Sunim was asked about how to practice after enlightenment, but I think his answer applies just as well to any point in our practice. There’s also a bit of practical advice about how to avoid false teachers (or becoming one yourself!)

Yong-jia (永嘉玄覺, 665-713) said about people who are satisfied with one enlightenment experience and so stop practicing: “Saying that everything is empty, yet ignoring cause and effect, and behaving badly is to invite disaster.”

Don’t follow the example of those shallow people who misunderstand the meaning, who are too stubborn, who ignore the principle of cause and effect, and who don’t understand that what they receive is the result of their own actions.

If you don’t awaken to the living word and see only words and letters, or if you are caught by right and wrong, then you won’t be able to gather any strength, and your speech will not be in accord with your actions, so you won’t be able to avoid becoming one of those people who overestimate the level of their own practice. Thus you must have very sincere determination.