The Vitakkasanthana Sutta (MN 20) (The Removal of Distracting Thoughts) is the 20th discourse in Majjhima Nikaya of Pāli Canon in Theravada Buddhism.
In the Theravadin Tipitaka, the Vitakka-saṇṭhāna Sutta is the twentieth discourse in the Majjhima Nikaya (MN) and is thus often designated by "MN 20"; in the Pali Text Society (PTS) edition of the Canon, this text begins on the 118th page of the first volume of its three-volume Majjhima Nikaya (M), and is thus alternately represented as "M i 118".
In the language of one translation, when the mind has become filled with hatred or illusion by dwelling on a bad ("adventitious") object, the aspirant (bhikku) should replace the bad thought with a good ("skilled") thought (Pali: tato nimittato aññam nimittam): Like an experienced carpenter or carpenter's apprentice, striking hard at, pushing out, and getting rid of a coarse peg with a fine one, should the bhikkhu in order to get rid of the adventitious object, reflect on a different object which is connected with skill.
So too...when a bhikkhu gives attention to stilling the thought-formation of those thoughts...his mind becomes steadied internally, quieted, brought to singleness, and concentrated.
[6] Martine Batchelor characterized the Vitakkasanthana Sutta as a discourse "which seems to illustrate an early Buddhist cognitive behavioural strategy.
When I first heard a vipassana teacher explain this sutta, I was particularly struck because it was an exact description of what I had found myself doing after practising Zen meditation for 10 years.