In protecting oneself, others are protected; In protecting others, oneself is protected.
You are the source of all purity and impurity. No one purifies another.
One way leads to acquisition, the other leads to nirvana. Realising this a monk should take no pleasure in the respect of others, but should devote himself to solitude.
When action comes out of nothing it creates no karma.
It is a man's own mind, not his enemy or foe, that lures him to evil ways.
He who harms living beings is, for that reason, not an ariya (a Noble One); he who does not harm any living being is called an ariya.