Jesus tells his disciples they must abide in Him as He does in them. This is a close relationship. In the image of the vine and the branches, we (the branches) obtain strength from the vine (Christ). If we are cut off, we wither. This is a close almost symbiotic relationship. Do we have that, or does sin get in the way and keep us from the nourishment we need in Christ to bear fruit. Philip is an example of what can happen if we are indeed in Christ, yet it seems inconceivable someone can be so close in obedience to God.