Jesus told them that the Holy Spirit would come and teach them what was necessary. The Holy Spirit would guide them into all truth and tell them about future events. This is an important way to test whether we are truly led by the Holy Spirit in a particular task or not. Dear listener, how can you understand the Word of God and know the truth when you do not know and do not have the Holy Spirit? I was your friend, the Holy Spirit will be your friend. I was your guide, the Holy Spirit will be your guide. I was the source of everything for you, the Holy Spirit will be the source of everything for you. I was your helper, the Holy Spirit will be your helper. I was your comforter, the Holy Spirit will be your comforter. The Holy Spirit wrote the Holy Bible, the Holy Spirit not only wrote the Word of God, but Himself, who is the interpreter of the Word of God, dwells in us and gives us light to understand the Word of God. This is the vital and eternal work of the Holy Spirit. He opens the meaning of God's Word to us.