Anguttara Nikāya - The Numerical Discourses

1: The Book of the Ones

1. Obsession of the Mind - 25

1 “I, O bhikkhus, do not see even one other dhamma which [when] not thus brought into being, not manifested, leads to great harm as this, the mind. The mind, O bhikkhus, [when] not brought into being, not manifested, leads to great harm.”

1 nāhaṃ bhikkhave aññaṃ ekadhammampi samanupassāmi, yaṃ evaṃ abhāvitaṃ apātubhūtaṃ mahato anatthāya saṃvattati. yathayidaṃ cittaṃ. cittaṃ bhikkhave abhāvitaṃ apātubhūtaṃ mahato anatthāya saṃvattatīti.