2 Peter 1:3-9 (ETRV) 3 Jesus has the power of God. And his power has given us everything we need to live a life devoted to God. We have these things because we know him. Jesus chose us by his glory and goodness, 4 through which he also gave us the very great and rich gifts that he promised us. With these gifts you can share in being like God. And so you will escape the ruin that comes to people in the world because of the evil things they want. 5 Because you have these blessings, do all you can to add to your life these things: to your faith add goodness; to your goodness add knowledge; 6 to your knowledge add self-control; to your self-control add patience; to your patience add devotion to God; 7 to your devotion add kindness toward your brothers and sisters in Christ, and to this kindness add love. 8 If all these things are in you and growing, you will never fail to be useful to God. You will produce the kind of fruit that should come from your knowledge of our Lord Jesus Christ. 9 But those who don't grow in these blessings are blind. They cannot see clearly what they have. They have forgotten that they were cleansed from their past sins.
Our own changed lives are the outward evidences of a genuine salvation.
Peter wrote this letter to help believers face a world filled with subtle spiritual deception. He wanted to remind his readers of the truths he had already taught them, so that those truths would continue to safeguard them after he was gone (v. 15). Peter reminds his readers that it is only by faith we are saved, not because of something we did but because of all that Christ did for us. But then he calls us to "partner" with God. He tells us that we are to "make every effort" to develop the qualities of goodness, knowledge, self-control, patience, devotion to God, kindness to your Christian family and love. He says that faith comes first but from that faith we must make every effort to add to it. God works in us as we do our part and what happens is that the fruit of the spirit is developed in us.
Don't debate what part is the Spirit's what part is ours. Act as if the responsibility were all ours knowing that the fruit is all His. How are you adding to your faith?