All tremble at violence; life is dear to all. Putting oneself in the place of another, one would not kill nor cause another to kill.
Dhammapada, verse 130
"Dhammapada: The Path of Dhamma", edited by Access to Insight. Access to Insight (BCBS Edition), 30 November 2013, http://www.accesstoinsight.org/tipitaka/kn/dhp/index.html