How do we know that salvation is for the sheep?

The affirmation that salvation is for the sheep is deeply rooted in the atoning work of Christ, who claims in John 10:15 that He lays down His life for the sheep. This act of love and sacrifice ensures that those whom the Father has given to Him will indeed be saved. Moreover, the assurance comes from the reality that those who are Christ's sheep will invariably respond to His voice—showing a vital connection between His redeeming work and the effectual call of God in the hearts of His chosen people. Thus, the security of the believer lies not in themselves but in the faithfulness of Christ, who promises that His sheep will never perish.