Our relationship with God has to be deeper than just our acknowledgement of His existence. We must abide in Him, abide in His Word and in his Presence. Our fruitfulness in this life solely depends on being connected, on remaining, to Jesus.
Pastor Josh makes these points:
1) Removal and pruning are necessary for growth
2) The branch cannot bear fruit by itself
3) Fruit glorifies God and testifies to the One we are connected to