In His teachings with the Apostles, Christ likens himself unto a vine in John 15.
1 I am the true vine, and my Father is the husbandman.
Obviously, with the analogy of Christ being the vine, disciples of Christ can be likened to the branches. The fruit of the branches is the good works that come from being a faithful follower of Christ. They can be seen, felt, and tasted of. When we do not bear fruit, we are taken away, no longer abiding with Christ. When we do bear fruit, we are purged so that we can bring forth more. Continuing with the metaphor, purgeth means purifying, testing, or proving. When we are righteous, we are given more trials and opportunities to test us, to strengthen us, to purify us so that we may bring forth more fruit and become better disciples of Jesus Christ.
4 Abide in me, and I in you. As the branch cannot bear fruit of itself, except it abide in the vine; no more can ye, except ye abide in me.
The vine is the branch’s source of nourishment, of life. Without Christ we are and can do nothing. If we want to do good in the world and show forth our faith, we must abide in Christ. I know this to be true. Jesus Christ is the vine that gives us life and energy. He is the source of the branches’ good fruits: every good thing in life.