釋禪波羅蜜次第法門 4.26

4.26

Second, regarding the obstacle of evil thoughts and reflections: When a practitioner wishes to cultivate concentration, although they are not sunken, dark, and drowsy, a mind of evil thoughts arises. They think of wanting to commit the ten unwholesome actions, the four grave offenses, the five heinous deeds, violating prohibitions, returning to lay life, and the like, without stopping even for a moment. Because of this, it obstructs the various dhyāna-concentrations so that they cannot unfold. This is the mark of the manifestation of the obstacle of evil thoughts and reflections.