Therefore, laying aside all malice, all deceit, hypocrisy, envy, and all evil speaking, (2) as newborn babes, desire the pure milk of the word, that you may grow thereby, (3) if indeed you have tasted that the Lord is gracious. 1 Peter 2:1-3
The passions and desires of a converted saint are different from the cravings of the sinner. Even though there is still that memory of a life without power driven by the force of sin, he is now free to make better and wiser choices. One must be fully aware of the power of the gospel of Jesus Christ to save everyone who believes. The tensions that exist between the bondage of the past and the freedoms that lie ahead in the future will be ever present. Yet they are now expendable. These things may try to attach themselves to you, but they have been expelled from within you. This is what Peter was addressing when he instructed believers to lay all these other things aside. They do not give expression to the new nature within you. You are now in control and responsible for how these things affect you.
Allow your affections to be directed towards those things that add to your faith in Jesus Christ. This is the surrender offered to the believer, that is, to allow the Holy Spirit to give full expression of the character of Christ. This is not striving but resting and letting Him take full and complete control.
A babe is fed food that increases his growth and productivity. You will desire these things as evidence of a changed life within you. He is telling you to set your affections on things above. The time spent in seeking them will have you too preoccupied to waste time in other areas. Being fed by the Lord will allow you to understand how gracious He is to you to allow you to partake of what is exclusively His.