A shepherd is a leader. Leaders are not served by those they lead, they serve them. That does not mean that the leader does as they are told, but that they see their role as one of leading others, not dominating, or dictating to others. Good leaders, are also good followers as a rule, and have influence regardless of whether or not they have any power to enforce, or intimidate. Short of these abilities, attitudes, and influential ways, you are a dime a million, easily replaced, and of little value to any organization. If you have these types of abilities, talents, and atttitudes you are few, and far between, almost impossible to replace, and of almost priceless to those around you, and the teams you lead.
If you have worked for this type, which is the only type of leader there is, you know what I mean. If you have not, then you are one of the unfortunate, and probably do not comprehend what real leadership is.
This does not mean a person cannot be a manager, supervisor, superintendant, president, vice president, senator, father, boss, arsehole, or be in any position of power, and authority without these qualities applied. It just means they are not a leader, but a baby sitter, as opposed to someone doing child rearing.