Introduction (by Bhikkhu Khantipalo)
There were some strange people around in the Buddha's days believing some strange things -- but that is no different from our own days when people still believe the most odd off-balance ideas. In this sutta we meet some people who believed that by imitating animals they would be saved. Maybe they're still with us too!

Belief is often one thing, action another. While beliefs sometimes influence actions, for other people their beliefs are quite separate from what they do. But the Buddha says all intentional actions, whether thoughts, speech or bodily actions, however expressed, are kamma and lead the doer of them to experience a result sooner or later. In this sutta the Buddha classifies kamma into four groups:

(i) dark with a dark result,
(ii) bright with a bright result,
(iii) dark and bright with a dark and bright result,
(iv) neither dark nor bright with a neither dark nor bright result.

Dark (evil) kamma does not give a bright (happy) result, nor does bright (beneficial) kamma lead to dark (miserable) result. Kamma can be mixed, where an action is done with a variety of motives, some good, some evil. And that kind of kamma also exists which gives up attachment to and interest in the other three and so leads beyond the range of kamma.