How do we know that all believers are God's property?

The doctrine that all believers are God's property is rooted in Romans 14:7-8, which states that 'none of us liveth to himself, and no man dieth to himself.' Every believer, whether living or dying, belongs to the Lord. This highlights our identity in Christ and the fact that we are bought with a price. We are to honor God in our bodies and spirits, which belong to Him. This ownership implies a responsibility to live according to His will and to consider how our actions affect others within the body of Christ.