Believers are heirs of God through their faith in Jesus Christ, which grants them rights to the covenant promises.
In the context of Spurgeon's interpretation, believers can know they are heirs of God because their inheritance is rooted in their faith in Christ rather than their spiritual maturity. In Galatians 3:29, it is affirmed that if we belong to Christ, we are Abraham's descendants and heirs according to the promise. This means that every believer, no matter how young or weak in the faith they may feel, has a rightful claim to all that God has promised. The significance of this assurance lies not in personal achievements but in the unchanging nature of God's promises, which are secure and steadfast for every child of God.
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