Man on Earth can gain more and more knowledge of what the nature of his life will be when he passes through the gate of death. There are people who say: ‘Why do I need to know all this? I shall surely see it all after death!’ — That attitude is just as if a man were to doubt the value of eyesight. For as the Earth’s evolution takes its course, man enters more and more into a life in which he must acquire the power to partake in these after-death experiences by grasping them, to begin with in thought, here on the Earth. To shut out knowledge of the spiritual worlds while we are on the Earth is to blind ourselves in soul and spirit after death. A man will enter the spiritual world as a cripple when he passes through the gate of death, if here, in this world, he disdains to learn about the world of spirit, for humanity is evolving towards freedom — towards free spiritual activity. This fact should become clearer and clearer to mankind and should make men realize the urgent necessity of gaining knowledge about the spiritual world.
Source: Rudolf Steiner – GA 219 – Man and the World of Stars: II: Moral Qualities and the Life After Death. Windows of the Earth. – Dornach, December 1, 1922
Translated by Dorothy S. Osmond