|Chapter 2: Contents of the Gita Summarized|
tani sarvani samyamya
yukta asita mat-parah
vase hi yasyendriyani
tasya prajna pratishthita
One who restrains his senses, keeping them under full control, and fixes his consciousness upon Me, is known as a man of steady intelligence.
This is a significant verse because for the first time Krishna declares Himself as the object of devotion. So far He has been speaking about the Supreme, notionally or in third-person. Now, He reveals that all of that is in relationship with Him. Factually, Krishna is claiming for the first time that indeed He is the Supreme Personality of Godhead.
The first half of the process described in this verse is restraint of the senses. Krishna then directs one to fix his consciousness upon Him. He says that one who has succeeded in both is "known as a man of steady intelligence." Why does Krishna now talk of sense control, having talked about the near impossibility of doing it, in the previous verses. To explain this, Srila Prabhupada quotes Srila Baladeva Vidyabushana, a great vaishnava acarya as saying, "The senses can be completely controlled only by the strength of devotional service to Krishna." So the sense control is there, but the motivation is not from the platform of mental speculation (jnana) but from that of devotional service (bhakti).
But what if, when trying to reach this stage, one fixes his senses on an object of enjoyment and views it as separate from Krishna's service?
Please read the Sanskrit Verse and the Prabhupada's Purport.