durÄpÄ hy alpa-tapasaḥ
sevÄ vaikuṇá¹ha-vartmasu
yatropagÄ«yate nityaá¹
deva-devo janÄrdanaḥ
durÄpÄ - very difficult to achieve; hi - certainly; alpa-tapasaḥ - by a person not advanced in spiritual life; sevÄ - service; vaikuṇá¹ha-vartmasu - unto persons on the path back home, back to Godhead; yatra - wherein; upagÄ«yate - is worshiped and glorified; nityam - regularly; deva-devaḥ - the Supreme Personality of Godhead; janÄrdanaḥ - Lord Kṛṣṇa.
This verse is a quotation from ÅšrÄ«mad-BhÄgavatam (3.7.20). It was spoken by Vidura in his conversation with Maitreya Ṛṣi, a great devotee of the Lord.