John 15:1-2 - I am the true vine, and my Father is the gardener. He 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. (NIV)
Philippians 1:6 - Being confident of this, that he who began a good work in you will carry it on to completion until the day of Christ Jesus. (NIV)