What does it mean that Jesus is the successful shepherd?

Christ is referred to as the successful shepherd because He effectively accomplishes the work of redemption for all His sheep. His success is evidenced in that He seeks out those who have gone astray and returns them to Himself, as stated in John 10:16. This reflects His role not only as a guide but as one who ensures the safety and eternal security of His flock. The assurance that none of His sheep will be lost reinforces the belief in His sovereignty and power to save, as expressed in 1 Peter 2:25, affirming that we are returned to the shepherd and bishop of our souls. His success in gathering His people highlights God's faithfulness in fulfilling His promises.