Karma. Anyone understand it? Excerpt from Bhikku Bodhi's paper:
The Buddha says:
"Monks it is volition that I call kamma. For having willed, one then acts by body, speech or mind". What really lies behind all action, the essence of all action, is volition, the power of the will. It is this volition expressing itself as action of body, speech and mind that the Buddha calls kamma.
This means that unintentional action is not kamma. If we accidently step on some ants while walking down the street, that is not the kamma of taking life, for there was no intention to kill. If we speak some statement believing it to be true and it turns out to be false, this is not the kamma of lying, for there is no intention of deceiving.