Okay kiddo, in John 14, Jesus is talking to his friends and telling them that he has to go away soon. His friends are feeling sad because they don't want him to leave. But Jesus tells them that he is going to prepare a place for them in heaven and that they will be together again someday.
Jesus also tells his friends that they can always talk to God and that God will help them. He says that he is like the way to God and that if they believe in him, they will be saved.
Jesus also promises to send his friends a helper, someone called the Holy Spirit, who will guide them and remind them of the things he has taught them.
So in John 14, Jesus is telling his friends that even though he is leaving, they will always be connected to each other and to God, and that God will always be with them to help them.