Devote the mind to the service of God alone. Practice meditation!” Focus on His Supreme form within the core of one’s heart.

Sankhya Yoga 

Chapter 2, Verse 60

 

yatato hyapi kaunteya 

puruṣasya vipaścitaḥ 

indriyāṇi pramāthīni 

haranti prasabhaṁ manaḥ

 

Even the mind of the wise man who labours for perfection is carried away by the vehement insistence of the senses, O son of Kunti.

 

Here Lord Krishna speaks about wise men, the wise people, who have the full knowledge of what is ‘good’ and what is ‘not good’. These people “who labour for perfection” are doing their daily sadhana and are very focused and intense, but they can’t let go of the senses of sight, smell, taste, sound, and touch. Even the wise ones are bound by these objects of the senses. The sense objects may withdraw, but not the taste for the enjoyment of them. As long as an attachment to the enjoyment of sense objects remains in the heart of man, his senses will lead him to the enjoyment of sense objects. His mind, his intellect, cannot rest stable in God, because of the senses which are carrying away the mind. God, Krishna says that one must control all the senses. He says, “Devote the mind to the service of God alone. Practice meditation!” Focus on His Supreme form within the core of one’s heart. Lose oneself in this deepness; then the turbulence, the insistence of the senses will not tempt or bewilder the mind. Thus the mind will enter into this stability. The mind may still churn, but there will be only one aim: to attain the vision of God. 

Krishna says to Arjuna, “O son of Kunti, become like the yogi who has a stable mind and makes a special effort to control his senses by totally renouncing attachment to the objects of the world.” Bhagavan is also saying that when you serve the Lord, you should not expect anything in return – not even the blessing of God, because you can’t make a deal with Him. You can’t say to God, “I love you, I’m doing this for you, but in return I want you to bless me or love me back.”

Bhagavad Gita