How do we know that being part of the house of Jacob is significant for Christians?

The term 'house of Jacob' represents the covenant community of God's people, characterized by God's electing love. In Romans 9:11-13, Paul highlights how God's election is not based on human merit but solely on His sovereign will. For Christians, being part of this house means being called out of darkness into His marvelous light, as stated in 1 Peter 2:9. This is significant as it affirms identity and purpose; believers are not merely individuals but members of a spiritual family tasked with living according to His revealed truths and encouraging one another in faith. This community of faith is meant to glorify God and fulfill His redemptive purpose in the world.