Jesus is the Good Shepherd, God Himself come to shepherd His people as prophesied in Ezekiel 34–both the lost sheep of Israel and the Gentile sheep brought into His one sheepfold (John 10), the Church.  Before His Ascension, He commissioned His Vicar on earth to continue in His stead as the Good Shepherd:

When they had finished breakfast, Jesus said to Simon Peter, “Simon, son of John, do you love me more than these?”  He said to him, “Yes, Lord; you know that I love you.”  He said to him, “Feed my lambs. … Tend my sheep. … Feed my sheep.”  (John 21:15-1, excerpted)