What does the Bible say about the perseverance of the saints?

The perseverance of the saints is a key doctrine in Reformed theology, emphasizing that those who have been truly saved will continue in faith until the end. This concept is supported by passages such as 1 John 2:19, which clarifies that those who leave the faith never truly belonged to it. True believers possess an unction or anointing from the Holy One, correcting and guiding them in their faith journey. God's commitment to keep His promises means that those who are genuinely His will not ultimately turn away from His truth. Romans 8:38-39 assures that nothing can separate believers from the love of God, ensuring their eternal salvation.