John Gill emphasizes that our love for God is a response to His prior love for us, which is eternal and unconditional. He explains that God's love is the foundation of our ability to love Him and others, as it precedes our own love and is the source of our faith and affection. Gill highlights that understanding the depth and antiquity of God's love should inspire and increase our love for Him, as it is free and unmerited. He also notes that the recognition of God's love is crucial for our spiritual growth and relationship with Him. Ultimately, our love is a reflection of His love, which is the driving force behind our devotion.