Sacrifice demands the surrender of things we cherish above all else. Only out of the agony of those losses can a new resolution be born. An undying devotion to a cause greater than one's self. And a moral duty to see a journey through to its absolute completion.
Sacrifice by its strictest definition takes something precious for the appeasement of a higher power, an abiding devotion to a cause that cannot be satisfied with a simple promise. Because an oath, no matter how solemn, asks nothing in return while true sacrifice demands unspeakable loss.