V. Can a method of gaining insight into spheres beyond the sense-perceptible world be given a scientific basis?

What is this meditation? It is a strengthening rather than a deepening of our thinking. Certain thoughts are brought to mind again and again until they have given our thinking so much inner density that thinking is not just thinking but becomes an event we experience like any other living experience that is more powerful than mere abstract thinking. That is meditation. Meditation calls for considerable effort. Depending on their individual disposition, people have to make great efforts, more or less, for months, years or even longer. The living experience of which I am speaking can, however, arise for everyone. It should provide the basis for spiritual investigation. It is not something arising from the living experience of the chosen few but something everyone can achieve. If we strengthen thinking in isolation, abstracted from sensory perception, it comes alive as much as do the events that happen in metabolism, for example.