In John 14:15-17, Jesus speaks to His disciples about the importance of love and obedience. He states that if they love Him, they will keep His commandments. Jesus promises that He will ask the Father to send them another Helper, the Holy Spirit, who will be with them forever. This Spirit is described as the Spirit of truth, whom the world cannot receive because it does not see or know Him. However, the disciples will know Him because He will dwell with them and be in them, providing guidance and support as they continue their mission.