Unless we acquire the faculty for the perception of truth in this physical world we shall never be able to unfold it in regard to the spiritual world. The capacity to find our true bearings in the spiritual world must be developed here in the physical world.
It is for this purpose that we are placed in the physical world, where it behoves us to seek agreement between idea and objective reality, in such a way that this may become natural to us, may become a habit and a faculty which we then carry with us into the spiritual world.
But in these days there are so many who make statements with utter disregard of their conformity with objective fact, simply out of their feelings and emotions! This tendency is the very reverse of what is needed for the onward progress of humanity.
Source: Rudolf Steiner – GA 170 – Memory and Habit: III – Dornach, 28th August 1916