How do we know that God's grace is the basis for our inclusion in His family?

Ephesians 2:8-9 clarifies that we are saved by grace through faith, emphasizing that it is not of ourselves but a gift from God. This reinforces the reality that God’s decision to include us in His family is not based on our merits but on His sovereign will. Throughout Scripture, we see examples of individuals who were included in God’s family not due to their righteousness but because of God’s grace, such as David and Paul. This truth is central to Reformed theology, which teaches that our salvation and relationship with God is wholly reliant on His grace and the redemptive work of Jesus Christ.