1. Asubha Sutta.-There are four modes of progress with reference to a monk who lives contemplating the unloveliness of the body, the repulsiveness of food, etc. His attainment, however, may be sluggish if his five indriyas (of faith, energy, etc.) are dull (A.ii.150f).
2. Asubha Sutta.-The idea of the foul, if cultivated, leads to great profit. S.v.132.