Jethro had no reason to be dissatisfied with the services rendered to him by his son-in-law. During the forty years Moses acted as his shepherd not one sheep was attacked by wild beasts, and the herds multiplied to an incredible degree. Once he drove the sheep about in the desert for forty days, without finding a pasturing place for them. Nevertheless he did not lose a single sheep.
Moses' longing for the desert was irresistible. His prophetic spirit caused him to foresee that his own greatness and the greatness of Israel would manifest themselves there. In the desert God's wonders would appear, though it would be at the same time the grave of the human herd to be entrusted to him in the future, and also his own last resting-place. Thus he had a presentiment at the very beginning of his career that the desert would be the scene of his activity, which not only came true in the present order of things, but also will be true in the latter days, when he will appear in the desert again, to lead into the promised land the generation, arisen from their graves, that he brought forth from Egyptian bondage.