The Atonement is the only defense that cannot be used destructively because it is not a device you made. The Atonement principle was in effect long before the Atonement began. The principle was love and the Atonement was an act of love. Acts were not necessary before the separation, because belief in space and time did not exist. It was only after the separation that the Atonement and the conditions necessary for its fulfillment were planned. Then a defense so splendid was needed that it could not be misused, although it could be refused. Refusal could not, however, turn it into a weapon of attack, which is the inherent characteristic of other defenses. The Atonement thus becomes the only defense that is not a two-edged sword. It can only heal.
The Atonement was built into the space-time belief to set a limit on the need for the belief itself, and ultimately to make learning complete. The Atonement is the final lesson. Learning itself, like the classrooms in which it occurs, is temporary. The ability to learn has no value when change is no longer necessary. The eternally creative have nothing to learn. You can learn to improve your perceptions, and can become a better and better learner. This will bring you into closer and closer accord with the Sonship; but the Sonship itself is a perfect creation and perfection is not a matter of degree. Only while there is a belief in differences is learning meaningful.
Evolution is a process in which you seem to proceed from one degree to the next. You correct your previous missteps by stepping forward. This process is actually incomprehensible in temporal terms, because you return as you go forward. The Atonement is the device by which you can free yourself from the past as you go ahead. It undoes your past errors, thus making it unnecessary for you to keep retracing your steps without advancing to your return. In this sense the Atonement saves time, but like the miracle it serves, does not abolish it. As long as there is need for Atonement, there is need for time. But the Atonement as a completed plan has a unique relationship to time. Until the Atonement is complete, its various phases will proceed in time, but the whole Atonement stands at time\’s end. At that point the bridge of return has been built.
Text 1. II.4-6