In terms of the vineyard, it is important for the branch to become connected with the vine, but it is equally important that the branch stay connected. Here is one of the problems in the Christian world. People have labored under the delusion that if they got with Jesus at some point in time, everything would be taken care of from then on. They become disappointed when they discover this isn't the case. In the same way we got with Him.
Connection comes by faith, and faith comes by communication.
If you don't communicate with someone, you will not be personally acquainted with him. You will not know him. It's that simple. The biggest problem of the church today is that we are not staying connected to the vine. We are not spending time day by day in communicating with Jesus.