The Ministries Of the Holy Spirit
The disciple's great fear is that if Jesus goes away, they will know and experience Him less. Jesus explains to them that in fact, the opposite is true. The disciples will know more of Christ because He will send His Spirit and the Spirit of Christ will dwell with them and in them. And Christ assures them that despite the trials and tribulations they will experience, Christ will give them his joy and his peace to be in them.