When illusions are seen for what they are they disappear. The resurrection demonstrated the power of truth-realization to overcome the body of death. Jesus speaking in the "Special Messages"
I did assume a human form with human attributes afterwards, to speak to those who were to prove the body’s worthlessness to the world. This has been much misunderstood. I came to tell them that death is illusion, and the mind that made the body can make another since form itself is an illusion. They did not understand. But now I talk to you and give you the same message. The death of an illusion means nothing. It disappears when you awaken and decide to dream no more. And you still do have the power to make this decision as I did.
God holds out His hand to His Son to help him rise and return to Him. I can help because the world is illusion, and I have overcome the world. Look past the tomb, the body, the illusion. Have faith in nothing but the spirit and the guidance God gives you. He could not have created the body because it is a limit. He must have created the spirit because it is immortal. Can those who are created like Him be limited? The body is the symbol of the world. Leave it behind. It cannot enter Heaven. But I can take you there any time that you choose. Together we can watch the world disappear and its symbol vanish as it does so. And then, and then — I cannot speak of that.
A body can not stay without illusion and the last one to be overcome is death. This is the message of the crucifixion; There is no order of difficulties in miracles. This is the message of the resurrection: Illusions are illusions. Truth is true. Illusions vanish. Only truth remains.
These lessons needed to be taught but once, for when the stone of death is rolled away, what can be seen but an empty tomb? And that is what you see who follow me into the sunlight and away from death, past all illusions, on to Heaven’s gate, where God will come Himself to take you home.
A Course in Miracles Urtext, Special Messages