Srimad Bhagavatam Canto 09, Chapter 18, Text 51

SB 9.18.51

evam varsa-sahasrani
 manah-sasthair manah-sukham
vidadhano ’pi natrpyat
 sarva-bhaumah kad-indriyaih
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Although Maharaja Yayati was the king of the entire world and he engaged his mind and five senses in enjoying material possessions for one thousand years, he was unable to be satisfied.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The kad-indriya, or unpurified senses, can be purified if one engages the senses and the mind in Krsna consciousness. Sarvopadhi-vinirmuktam tat-paratvena nirmalam. One must be freed from all designations. When one identifies himself with the material world, his senses are impure. But when one achieves spiritual realization and identifies himself as a servant of the Lord, his senses are purified immediately. Engagement of the purified senses in the service of the Lord is called bhakti. Hrsikena hrsikesa-sevanam bhaktir ucyate. One may enjoy the senses for many thousands of years, but unless one purifies the senses, one cannot be happy.
 
Thus end the Bhaktivedanta purports of the Ninth Canto, Eighteenth Chapter, of the Srimad-Bhagavatam, entitled “King Yayati Regains His Youth.”