How do we know that believers shall not be cut off?

The assurance that believers shall not be cut off is rooted in God's faithfulness and sovereignty. In Isaiah 56:5-8, we read that those whom God gives an everlasting name are secure in their relationship with Him. Regardless of their actions or circumstances, His promise guarantees their place in His household. The New Testament further reinforces this truth, as believers are assured in Romans 8:38-39 that nothing can separate them from the love of God. This underscores the concept of eternal security in the historic Reformed perspective, affirming that God's grace and election lead to perseverance in faith.