8. The Knowledge of the Spiritual Essence of the World
These insights cannot be gained by the methods currently used in scientific research. For this scientific method of investigation, which has achieved such great triumphs in recent centuries, triumphs that are fully recognized from the point of view that is asserted here, this scientific world view builds its knowledge on observation and experimentation, that is, on that which man can experience of the world through his senses. Of course, one does try — and must try — to penetrate intellectually that which the senses reveal about the world. In this way, one arrives at natural laws, that is, in a certain sense, at spiritual content, because the natural laws that one establishes in thought are, after all, a spiritual content. But the thoughts that one gains in this way, beyond observation and experiment, have no independent content; they only provide images of what the senses, either unarmed or armed, experience from the outside world. That is to say, the soul-spiritual in man reveals itself through what can be experienced by the human being through the senses, or through methodically trained sensory perception.