as they returned - If the duties of life must give place to worship, worship, in its turn, must give place to them. Jerusalem is good, but Nazareth is good, too; let him who neglects the one, on pretext of attending to the other, ponder this scene.
tarried behind ... Joseph and his mother knew not - Accustomed to the discretion and obedience of the lad [Olshausen], they might be thrown off their guard.