Short short with English summary
When I have a watermelon, I have to determine how to slice it. Why do I strain myself just for cutting a watermelon? Because I feel I have to. This can$B!G(Bt be an answer. But, in our history there have been so many similar explanations done by the responsible persons for the useless wars, genocides and indiscriminate bombings. They have never been sensible or reasonable.
Standing in front of a watermelon, why do I hesitate to slice? Perhaps because the watermelon is much bigger than my usual stuff and perhaps the watermelon is nearly a perfect sphere. $B!H(BThe sun, the moon, petit-tomatoes and caviar.$B!I(B Among the geometric forms only the sphere we can meet in nature with such a simple and clear form.
I cut off the top and bottom of the watermelon equivalent to the Arctic and Antarctic of the globe. Then I slice the watermelon vertically from the North Pole to the South Pole, to 1/2 then to 1/4. If I continue my cutting, the sliced pieces should get a form of the classic half moons. But, this classic half moon shaped water melon is actually not so functional form for me. My nose, chin and cheeks get very wet hitting the water melon, especially when my bite gets closer to the rind. Therefore, when I got a quarter of the water melon, I steer the direction of cutting to right angle, the direction parallel to the Zodiac. Now the slices are evenly thick, no wedge forms any more. The big slice from the Zodiac has a form of red right angle with a quarter of a circle rind.
If it were the Zodiac, the surface of this rind is a quarter of the circumference of the Globe, 10,000km. The length should be exactly or very close to 10,000km. Since Napoleon decided the circumference of the Globe 40,000km. The distance Tokyo-Paris is nearly 10,000km. The orbit of the International Space Station is approximately 1cm from the surface of the water melon. The jet-planes fly a fortieth of the orbit of the ISS, 1/4mm above the surface. The distances of the orbits of stationary satellites are approximately the length of the Zodiac, 90cm far from the water melon. The depths of the oil field which are naturally our common resources are less than 1/5mm depth in the green hard surface of the water melon.
While slicing a water melon, imaging the size of our globe, I ponder over all these continuous follies and violence in our world. Probably our political and economic systems are totally wrong.