vine, branches and fruit

john 15:
1"I am the true vine, and my Father is the gardener. 2He cuts off every branch in me that bears no fruit, while every branch that does bear fruit he prunes so that it will be even more fruitful. 3You are already clean because of the word I have spoken to you. 4Remain in me, and I will remain in you. No branch can bear fruit by itself; it must remain in the vine. Neither can you bear fruit unless you remain in me.
5"I am the vine; you are the branches. If a man remains in me and I in him, he will bear much fruit; apart from me you can do nothing.

I think the point is that we need to remain in Jesus, and we will bear much fruit. The pruning might be painful, but His desire is that we would be fruitful. He has chosen us and appointed us to bear fruit. We do that when we abide in Jesus and He abides in us.