People of the biblical world understood the illustrations used by their leaders, but many today, especially young people, do not understand these illustration without explanation.
Moses had led the people of God through the wilderness, but was soon to die after viewing the promised land from Mount Nebo. He then appealed to the LORD to provide a shepherd for Israel.
15 Moses spoke to the LORD, saying,
16 “Let the LORD, the God of the spirits of all flesh, appoint a man over the congregation
17 who shall go out before them and come in before them, who shall lead them out and bring them in, that the congregation of the LORD may not be as sheep that have no shepherd.” (Numbers 27:15-17 ESV)
Joshua was to be raised up as a leader — a leader like a shepherd.
Jesus used a similar illustration.
4 When he has brought out all his own, he goes before them, and the sheep follow him, for they know his voice.
5 A stranger they will not follow, but they will flee from him, for they do not know the voice of strangers.” (John 10:4-5 ESV)
Our photo provides a good illustration for those who do not have personal knowledge about shepherds and sheep.