Manifold Miseries

The practice of all the bodhisattvas is never to commit a harmful act,
Even though not to do so might put one’s very life at risk,
For the Sage himself has taught how negative actions will ripen
Into the manifold miseries of the lower realms, so difficult to endure.

~Gyelse Tokme Zangpo (via)

 

Of course, another reason never to commit harmful acts is because it's nicer.