yathā-yogya - as much as necessary; udara bhare - fills the belly; nā kare - does not do; viṣaya bhoga - material enjoyment; sannyāsīra - of a sannyāsī; tabe - then; siddha - perfect; haya - is; jñāna-yoga - spiritual advancement in knowledge.

“A sannyāsī eats as much as necessary to maintain his body, but he does not enjoy satisfying his senses materially. Thus a sannyāsī becomes perfect in his spiritual advancement in knowledge.