Lecture XVII
In the outer world thought is connected with everything having sensation and consciousness. This has one thing in common with us: perception. The fact that we can in any way perceive the outer world in physical space as a world of colour and sound is only possible because we are able to transpose it into thoughts. We receive perceptions; we think about them. If there were no thoughts in the perceptions it would be the greatest folly on man's part to form thoughts about them. Thoughts would then be mere illusions if the perceptions had not arisen through thoughts. From the combination of perceptions it follows that in the first place perceptions are built up by thoughts which we can then extract from them: the laws of nature. These are nothing other than thoughts; it is the creative Spirit, the Holy Spirit. Perception is the boundary between the two, where our thoughts come in contact with the creative thoughts outside. Thus with a thought that we have we cannot work directly on life, but on the consciousness which in the outer world is itself thought.