Is it farther or further?
in Theravada Buddhist tradition, one of the objects of mental concentration or a stage of meditation employing it. According to Visuddhi-magga (a 5th-century CE Pali text by Buddhaghosa), there are 40 kammatthanas; an individual should choose the object of mental concentration that is in accordance with his own character or inclination. Each type of disposition has its appropriate objects for mental concentration among the kammatthanas. The meditation of kammatthana is highly valued among Buddhist monks and is still practiced in Myanmar (Burma), Thailand, and other Southeast Asian countries.