IV. Knowledge of the Human Being According to Body, Soul or Spirit, Brain and Thinking — The Liver as a Sensory Organ

You see, these brain cells are basically half dead. That is what is most striking. Because little creatures like brain cells – when they are alive, they also move. And I have already explained the other cells to you: the white blood cells swim around like little animals. They are little animals too; they look just like them. But they swim around and eat. If there is anything in the blood that they can absorb, they absorb it, stretch out their feelers and suck it into their own body. And so they swim through and flow through our body like streams. So we have half dead and half living cells swimming around in our blood.