Let's have a look at these verses from John 15, and you tell me if man has no part in it, and if he does, then let's see if God does His part. I am going to put man's part in red, and God's part in blue.
4 Abide in Me, and I in you. As the branch cannot bear fruit of itself, unless it abides in the vine, neither can you, unless you abide in Me.
5 I am the vine, you are the branches. He who abides in Me, and I in him, bears much fruit; for without Me you can do nothing.
6 If anyone does not abide in Me, he is cast out as a branch and is withered; and they gather them and throw them into the fire, and they are burned.
7 If you abide in Me, and My words abide in you, you will ask what you desire, and it shall be done for you.
If a man (the branch) abides in Christ (the vine), the branch will bear much fruit. Bearing fruit is very much contingent upon man abiding in Christ. Therefore, man does his part, then God does His part.
Also, if a man abides in Christ (man's part), he can ask what he desires, and it shall be done to him (God's part).
We also have this, if a man does not abide in Christ (man not doing his part), he is cast out, withered, gathered, thrown into the fire, and burned (God's part).
So I ask, how do you contend this is not talking about man doing his part, and then God doing His part? (Matthew 13:14)