The Example of Carbon Source
The ancient desire is clear in the principle of the generation of all things, and it is observed in the matter of carbon source. Carbon source, the source of life depends on, and the source of biochemistry.

In the past, there was a place where the soil was fertile and moist, and the grass and trees flourished. All things in between depend on carbon sources for their survival. Looking at the trees, the spring is blooming, and the summer is lush, absorbing carbon and nourishing it in the roots. The leaves are open, photosynthesis is done, carbon dioxide is taken as a carbon source, and sugar is made to generate energy. This is the way to self-support.

There are insects, animals and the like, which cannot make their own nutrients, but only eat other things to obtain carbon sources. Rabbits eat grass, wolves eat rabbits, chains and rings are interlocked, and carbon sources flow in the middle. The carbon of the grass enters the body of the rabbit, the carbon of the rabbit, and enters the body of the wolf. And when it dies, it decays in the soil, and through the changes of time, it either turns into peat or into oil and gas, which is also a change of carbon source.

As for the water, algae float on waves, and also use carbon for photosynthesis. And the microorganisms at the bottom of the water decompose various things, so that the carbon source reciprocates, and the ecology is formed.

From this point of view, carbon comes from all things, just like the blood is used in the human body. The cycle is gratuitous, and the flow is endless. It is the mechanism of biochemistry between heaven and earth.