Charles G. Finney, 1792 - 1875
Well, the first part of the answer is quite simple, we don't do it! We live in the human, natural world. We can only attempt to meet problems on our own level. Only God can deal with matters sin the spiritual level. Jesus came to "set the captive free" - He is the Son of God, he came here to earth on a mission. He also says "Come to me....and I will give you rest!" And, the answer is that it's 'in' or 'through' faith in Jesus that we will indeed be set free. I am utterly convinced of the truth of this statement. Instead of trying to focus on a problem and fight it, rest in Jesus. Quietly, trust in him to face the addiction or problem for us. And suddenly there is peace! I have known this truth in my own life and have only to look very quickly around the Church to see people who were once (for example) drug addicts and been in hostels, rehabs, prison and psychiatric care now totally free and living wholesome lives and in several instances running their own successful businesses. What a living gospel we have!
So, let's add a few words. I said addiction, but, what about obsession, or compulsion? In other words, areas of our lives that are stronger than us and no matter how hard we try we can't get free of them. It could be lots of other things too, like a bad temper, bitterness, hatred, violence - or a fear or a phobia, and a whole lot more besides. This living gospel - the good news - is for us too. A living, loving Power come to set us free so that we may live the life we were born to live!
If you want to read Charles G. Finney's sermon (from 1874), click here.