In this world, very rare is the mendicant monk who is a Paramahamsa. If there is one, he is ever pure. He alone is the Purusha glorified in the Vedas. He who is a great man (maha purusha) has his mind resting in me, I too remain in him alone. He is the ever satisfied. He is free from the effects of cold and heat, happiness and misery, honour and dishonour. He puts up with insult and anger. He is devoid of the six human infirmities (hunger and thirst, sorrow and delusion, old age and death). He is without the intervention of elderliness or otherwise. Excepting the self, he sees nothing else. Unclad, bowing to none, not uttering 'svaha', not uttering 'svedha', free from blame or praise, not resorting to mantras and rituals, (karma kanda), not meditating on other gods (than the supreme God), refraining from aims and their absence, with all the activities ceased, firmly established in consciousness consisting of existence, knowledge and bliss, being conscious of the one supreme bliss, he ever meditates on the Brahmapranava, that he is Brahman alone, and thus fulfils himself. Such a one is the Paramahamsa mendicant monk.
Paramahamsa Parivrajakopanishad v.2-4 18