The human body moves and sustains itself centered on the heart. There is also a center of the spirit. This center is absolutely essential to human relationships.

Everyone has intestines. Inside them, we all have excrement. Can you say, "I don't need this; I want to get rid of it, I just want to keep what I need"? You cannot. You need everything, including excrement.

Everyone breathes. Have you ever counted how many times you breathe? Have you ever heard a hammering sound in your heart? If a fly lands on your hair, you sense it. Yet you don't feel the hammering of your heart. That's very strange, isn't it? Even though you sense the slight touch of a fly, you don't feel the hammering of your heart. It's really a big sound if you hear it through a stethoscope. If you compare it, the sound of your heart is several thousand times stronger than the touch of a fly. Yet you don't feel it. This is very mysterious.

If you count your pulse you will become neurotic. Try counting, one, two, three. Can you count it? You can go one week, ten days, or one whole month without even thinking once about your pulse. If you do think of it often, you will go crazy.

If you think, "Today my pulse is like this, but tomorrow it may be different," it will drive you crazy. Not knowing is good for you. If you could always feel your pulse, there would be trouble.

It's a good thing that the nervous system of our body is invisible. Imagine how it would be to live looking at your complicated nervous system all the time. Could you handle that? It's the most complicated machine of all machines, made up of hundreds of millions of parts. It could be broken, out of order. When you think of this, it's a good thing it's invisible to us. If it were visible to our eye it would be a big problem. If we were aware of the beating of our pulse it would be a problem, too.

Why aren't we aware of these things? Because they are too close to us. They exist inside us, not outside where our senses would be aware of them. If they were projected like a movie on a wall we would be aware of them. But they are projected around and beyond the wall, so we are unaware of them.

God is like this. We cannot see Him because He is too close to us. You cannot see your own eyes because they are too close to see. If something is too far away you cannot see it; if it is too close you can't see it either. That's the way it is. \But once you feel the love of God, you don't question whether there's a God or not. Isn't that so? The world is like that.

The brain is the center of the nervous system. Isn't that so? Can we see our nervous system? The heart is the center of the circulation system. Which one is the center? [The mind] Let's talk about the mind later. Now we're talking about the body. The nervous system and the circulation system must work together harmoniously. If the circulation system functions and the nervous system doesn't, it won't work. If the nervous system functions and the circulation system doesn't, it won't work either. Naturally they share a common fate. If the circulation system doesn't function, the nervous system automatically stops. If the nervous system is blocked, the circulation system stops. Isn't that true?

The human body is divided into two parts. Its dual characteristics exist in harmony. These two systems are related centered on what? Centering on our life. Can the blood flowing in the head say to the blood in the feet, "Don't come up here"? Are there any such boundaries? No! In this respect, there are no differences between black and white and yellow. Look at this, this skin is white, this skin is black. This is yellow. The colors are all different.

Originally, when germs enter our body the white blood cells fight back. Right? The germs are on the offensive, and the white blood cells are on the defensive. Life hangs in the balance in this offensive and defensive battle. Life itself is fighting.