This is the great lesson

The one thing we should like to teach the whole world is that once you have drawn your last breath on Earth, you should be done with Earth; that the door is open to a higher realm and that the loving Father-Mother is waiting to welcome you into this higher realm and bring you its great joys. The duties that await you are not duties connected with Earth at all; those are able to wait until your next incarnation when you will take them up once more and bear their Karma, having mentally learned what they really are and what the Karma is; consequently, not permitting it to cause as much suffering as it would through ignorance. This is the great lesson we ask you to help us teach.

Letters from the Teacher, Volume II, Universal Religious Fellowship Inc., Harriette Augusta Curtiss and F. Homer Curtiss, Curtiss Book Company, California, 1924