What does the Bible say about the certainty of salvation?

The Bible presents numerous affirmations of the certainty of salvation, particularly in the context of God’s unchanging character and His sovereign will. In Psalm 55:22, we find a powerful encouragement to cast our burdens on the Lord, with the promise that He shall sustain us and never allow the righteous to be moved. This assurance is echoed in New Testament verses like John 6:37, which states that all whom the Father gives to Christ will come to Him, and He will never cast them out. The unwavering commitment of God to His people guarantees their salvation, not based on human action or response, but on divine promise and purpose.