What is a joint heir?
A joint heir shares full rights to an inheritance with another. Believers are heirs of God and joint heirs with Jesus Christ, sharing in His inheritance. This joint heirship may involve suffering with Him and also glorification with Him through Christ.
Les explains that in Romans 8, verse 17, if we are children of God—true sons by virtue of saving faith—then we are heirs. He clarifies that we are not heirs of some rich grandfather or a corporation president with millions of shares, but something far greater: we are heirs of God and joint heirs with Jesus Christ. Les illustrates joint heirship with property ownership: if a husband and wife both own a home or property, they are joint heirs, both having rights to that property; if one dies, the property belongs to the one left behind, regardless of which one goes first. He teaches that this whole concept of joint heirship is part and parcel of the Christian experience—we are heirs of God because we are joint heirs with Jesus Christ. That may mean we will suffer with Him, and we may also experience glorification with Him. Les then returns to Galatians, noting verse 7 is in complete agreement with Romans 8: we are no more a slave but a son, one in full heirship, an heir of God through Christ.