If, for example, we change our breathing, we change the rhythm of our lungs; but since everything is connected, other rhythms also gradually begin to change. If we go on with this breathing for a long time it may change the rhythm of all the organs. For instance, the rhythm of the stomach will change. And the stomach has its own habits, it needs a certain time to digest food; say, for example, the food must lie there an hour. If the rhythm of the stomach changes, food may pass through more quickly and the stomach will not have time to take from it all it needs. In another place the reverse may occur. It is a thousand times better not to interfere with our machine, to leave it in bad condition rather than correct it without knowledge.
To work on oneself one must know every screw, every nail of one's machine—then you will know what to do. But if you know a little and try, you may lose a great deal. The risk is great, for the machine is very complicated. It has very small screws which can be easily damaged, and if you push harder you may break them. And these screws cannot be bought in a shop.
One must be very careful. When you know, it is another thing. If anyone here is experimenting with breathing, it is better to stop while there is still time.
Gurdjieff G. I. - Views from the Real World (Experiments with breathing talk)