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

Dr. Steiner: Now, regarding the question of the longitudinal stripe in fish, you must be clear about the following. When you look at any being, be it of the plant or animal world, you have to ask yourself how these beings relate to the outside world. You see, plants have their green color, first of all, in their leaves. This green color in the leaves comes from the fact that the plant has a very specific relationship to light and warmth. The plant absorbs what comes from the light on the one hand and gives back something else, which it does not absorb. And that is where the green color of the plant comes from.