We will never be able to discover the facts of the spiritual world unless we develop an attitude that acknowledges the facts of the physical world. The right way of experiencing the spiritual world must be developed here in the physical world. That is why we have been placed in the physical world: it is our task here to seek for ideas that are in harmony with objective reality, so that we acquire this ability and so that it becomes a habit we can carry with us into the spiritual world.
But today so many people base their assertions on nothing but emotion and are not in the least interested in whether they agree with objective reality. This is precisely the opposite of the direction in which humanity must move if it is to progress. And, especially in our materialistic age, the notion of thinking in accordance with reality has been so frightfully distorted by the influences we have been describing; thinking that is in accord with reality has become a rarity. And an honest attempt to think in accordance with reality today collides with all the contemporary thinking that is at variance with reality.
Source: Rudolf Steiner – GA 170 – Riddle of Humanity: Lecture Thirteen: Dornach, 28 August 1916