VI. The Connection Between the Higher Aspects of the Human Constitution and the Physical Body — The Effects of Opium and Alcohol

Now, in the case of fish, there is a very clear relationship between their own being and their environment. And these stripes on the edge are there to make the fish finely sensitive to light and warmth in their environment. So the fish become particularly sensitive as a result. This is not so useful for them - I have spoken of this before - for the way they move, but it is useful for the way they process light and warmth internally, so that this is a kind of nerve organ.