What does the Bible teach about the security of salvation?

In Matthew 18:14, it is stated, 'It is not the will of your Father who is in heaven that one of these little ones should perish.' This underscores the doctrine of eternal security for believers, signifying that those whom God has elected and redeemed will not be lost. The work of Christ, as a singular, complete, and accepted payment for sin, guarantees that all who are truly His will persevere in faith. This doctrine is a source of great comfort, allowing believers to rest in the assurance that their salvation is secure, anchored in the unchanging nature of God’s promises.