Charles H. Spurgeon on Psalms 78:71

From following the ewes great with young he brought him to feed Jacob his people, and Israel his inheritance. Exercising the care and art of those who watch for the young lambs, David followed the ewes in their wanderings; the tenderness and patience thus acquired would tend to the development of characteristics most becoming in a king. To the man thus prepared, the office and dignity which God had appointed for him, came in due season, and he was enabled worthily to wear them. It is wonderful how often divine wisdom so arranges the early and obscure portion of a choice life, so as to make it a preparatory school for a more active and noble future.