Jesus is giving last instructions to his followers. He tells them to be fearless (14:1); he tells them to trust in him (14:6); he tells them they will never be abandoned or alone (14:16-18); he tells us to live in peace (14:27).
Sections of this chapter are often read at Funerals. Curiously, it contains language that was part of the 1st century betrothal ceremony. The groom to be would arrive at the house and would offer a cup of wine to the intended. If she took the cup and drank she was accepting his proposal. He would then say "I am going to prepare a place for you. I will come again and take you to myself so that where I am there you will be also." He would then leave, build a home for the two of them after the completion of the home they would be married and begin life together. It is Jesus promise to his followers that his departure is temporary that he has gone only long enough to prepare a place for us -- he will come back and take us to be with him forever.