“He [God] cuts off every branch [Christ followers] in me [Jesus] that bears no fruit, while every branch that does bear fruit he prunes so that it will be even more fruitful.” John 15:2
The function of pruning a plant is so that it can continue to grow and produce more fruit. For those of us who don’t garden, I asked my grandma to break this down for us. First, you cut off the dead branches that don’t leaf because you can tell early on that they were never going to bear fruit. There are also times when you have to cut off rapidly growing branches because they are sucking life from the rest of the plant. An example of this might be doing good things for the kingdom but doing them with selfish motives. In both cases, those two branches will not bear fruit and are cut off of the vine. Then, there are times when you prune a healthy branch causing it to send up two healthy shoots from where it was pruned, subsequently making it bear even more fruit. At the end of the day, the branches must be useful and God will prune them until He feels they are fit for His service.