From "The Vine and the Branches", by David Tryon:
WHAT CAN YOU DO?
Let me emphasize that, for it is a truth that we are so slow to learn. How much does the vine life do towards producing the fruit? Everything. How much does the branch do to help? Nothing. How much must the life of the Holy Spirit do in you? Everything. How much must you do to help? Nothing. Just as Christ in His death and resurrection did everything for your justification, and you did nothing, but simply accepted the benefits of a work finished nineteen centuries before you were born so Christ in you must do everything for your sanctification, and you must do nothing, but simply accept the benefits of a work which He will complete as surely as He has begun it.
"But," you ask," must I not do anything? " No, nothing. " Oh, but now you are going too far. You can't carry things to that length. Of course I must do something. Mustn't I read my Bible and pray; mustn't I witness for Christ; mustn't I surrender everything to Him; mustn't I do good works whenever I get the opportunity?" Do you know what you are like? You are like a branch saying, "It's no good you telling me that I mustn't do anything in order to produce fruit. That's going too far. Of course I must do something. Mustn't I produce fruit?" I should say to that branch, "Yes, of course you must produce fruit, but you'll never produce fruit by trying to. It is not the fruit you need to be concerned about, but the life. If once you have got that, the fruit will come all right." And so I reply to you, Yes, of course you must read your Bible and pray and witness and do good works; of course you must surrender completely to Christ, but don't you see, all these things are part of the fruit. You cannot do them by trying to do them; you can only imitate them; you can only be like a branch tying on artificial fruit, because it does not understand that real fruit must be the result of the vine life within. Leave the fruit for the moment. Apart from Him you can do NOTHING; and prayer and witness and surrender are all included in that "nothing." Every single bit of fruit has to be the result of the life of Christ in you. It is the Life you need to be concerned about; if you have got that, the fruit will surely follow.