Marvelous Grass

Grass is so tiny, yet so marvelous. You can destroy it on the ground today, but tomorrow it reappears. The main reason is that it is protected by the soil, which is mighty enough to protect everything in the world.
Many years ago, scientists got together to study what the mightiest thing in the world was. Some said lions, some elephants, but finally, they concluded that grass is the strongest. If we put some grass on the soil, a few days later, there will be green on the soil. They never die.
If you put green grass under a stone, in a few days, green will appear from cracks in the stone, even if the cracks are tight. We cannot understand why the strength of grass is so great. It can grow from any crack.
From here, we can learn a philosophy that the softest thing is the mightiest. Grass is an example.