There are four kinds of snakes in the world: the venomous but not fierce, the fierce but not venomous, the one that is both and the one that is neither. Similarly there are four kinds of persons: the one quick to get angry but with short-lived anger, the one slow to get angry but with lasting anger, etc. (A.ii.110-11)

Āsīvisa Vagga.– The nineteenth chapter of the Saḷāyatana Saṃyutta of the Saṃyuttanikāya. J.iv.172-204.