"Not by adopting the outward form does one become a bhikkhu."
"He who has no attachment whatsoever towards the ‘mind-and-body’ and who does not grieve for what he has not, – he indeed, is called a bhikkhu."
"Whoso herein, has abandoned both merit and demerit, he who is holy, he who walks with understanding in this world, – he indeed, is called a bhikkhu."
Dharmapada