John Gill emphasizes that communion with God is the pinnacle of the Christian experience, representing the closest relationship believers can have with the divine in this life. He explains that this communion is rooted in the union between God and His people, established through Christ and the Holy Spirit, and is characterized by mutual indwelling, walking together, and conversing with God. Gill highlights that only those who are redeemed, regenerated, and sanctified can enjoy this fellowship, which is a profound blessing and a source of joy and strength. He further elaborates on the special communion believers have with the Father, Son, and Holy Spirit, underscoring the honor and value of such a relationship. Ultimately, Gill portrays this communion as a foretaste of heavenly bliss, making it a vital aspect of the believer's life.