367. He who never identifies himself with name and form, and does not grieve over what is no more, he indeed is called a Bhikshu.
368. The Bhikshu who acts with kindness, who is calm in the doctrine of Buddha, will reach the quiet place (Nirvâna), cessation of natural desires, and happiness.
DHAMMAPADA, Chapter 25. THE BHIKSHU (MENDICANT)