The Lord bids each one of us in all life’s actions to look to his calling. For He knows with what great restlessness human nature flames, with what fickleness it is borne hither and thither, how its ambition longs to embrace various things at once. Therefore, lest through our stupidity and rashness everything be turned topsy-turvy, He has appointed duties for every man in his particular way of life. And that no one may thoughtlessly transgress his limits, He has named these various kinds of living “callings.” Therefore each individual has his own kind of living assigned to him by the Lord as a sort of sentry post so that he may not heedlessly wander throughout life.