Neither cause nor effect is ever final, unchangeable - that would be everlasting enslavement and decay. Each effect of a cause is undergoing many influences from within and from without, it is constantly changing, and it becomes in its turn the cause of still another effect. Through the understanding of what is actually taking place, this process can be stopped instantaneously, and there is freedom from that which has been. Karma is not an ever enduring chain; it's a chain that can be broken at any time. What was done yesterday can be undone today; there's no permanent continuance of anything. Continuance can and must be dissipated through the understanding of its process.