What does the Bible say about the nature of salvation?

According to Scripture, specifically Proverbs 20:9, no one can claim to have made their heart clean or to be pure from sin. Sin affects every aspect of our human nature, rendering us incapable of saving ourselves. The heart is described as deceitful and desperately wicked (Jeremiah 17:9). The concept of total depravity in Reformed theology asserts that we are unable, unwilling, and powerless to come to God on our own. This reveals the necessity for divine intervention; it is God alone who creates a clean heart within us, as emphasized in Psalm 51:10. His saving grace is the foundation of our hope for salvation.