Srimad Bhagavatam Canto 08, Chapter 08, Text 20

SB 8.8.20

nunam tapo yasya na manyu-nirjayo
 jñanam kvacit tac ca na sanga-varjitam
kascin mahams tasya na kama-nirjayah
 sa isvarah kim parato vyapasrayah
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
The goddess of fortune, examining the assembly, thought in this way: Someone who has undergone great austerity has not yet conquered anger. Someone possesses knowledge, but he has not conquered material desires. Someone is a very great personality, but he cannot conquer lusty desires. Even a great personality depends on something else. How, then, can he be the supreme controller?
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
Here is an attempt to find the supreme controller, or isvara. Everyone may be accepted as an isvara, or controller, but still such controllers are controlled by others. For example, one may have undergone severe austerities but still be under the control of anger. By a scrutinizing analysis, we find that everyone is controlled by something else. No one, therefore, can be the true controller but the Supreme Personality of Godhead, Krsna. This is supported by the sastras. Isvarah paramah krsnah: the supreme controller is Krsna. Krsna is never controlled by anyone, for He is the controller of everyone (sarva-karana-karanam).
Srimad Bhagavatam Canto 08, Chapter 08, Text 19
Srimad Bhagavatam Canto 08, Chapter 08, Text 21