摩訶止觀 1.65

1.65

若得此意，歷一切根塵、三業、四儀，生心動念皆此觀察，勿令濁心得起。設起速滅，如有明眼人能避險惡道，世有聰明人能遠離眾惡。初心行者若見此意，堪為世間而作依止。

If one grasps this intention, examining through all sense faculties and objects, the three karmas, and the four postures whenever a thought arises or a mental impulse moves, one must not allow a turbid mind to arise. If it should arise, extinguish it swiftly, just as a person with clear eyes can avoid dangerous paths, or a clever person in the world can keep far away from all evils. If a beginner practitioner perceives this principle, they are worthy to serve as a refuge for the world.