The relationship between God and us is a relationship in the spirit because the Spirit of God dwells in our spirit, works together with our spirit, and is even joined and mingled together with our spirit. Romans 8:16 says that the Holy Spirit witnesses with our spirit, and 1 Corinthians 6:17 tells us that we are one spirit with the Lord. These verses prove that the divine spirit and our human spirit have been mingled together to be one spirit.