One Chinese emperor had a very skilled and experienced military leader. Then one day, after one of his great victories, a great celebration was held in the imperial palace, where they ate and drank a lot.
At the end of the holiday, late at night, the military leader returned home. And suddenly he saw a tiger hiding in the bushes near the bend in the road. And this tiger had already crouched down and was ready to jump. Despite the wine he drank at the celebration, the military commander reacted immediately. In the blink of an eye, he drew his bow, drew it and released an arrow that hit the tiger to death.
When the commander woke up in the morning, he remembered this event and decided that he should make a stuffed tiger as a reminder of this event. He went to the same place and suddenly discovered that in the darkness he mistook a huge rock for a tiger. And this rock is pierced by an arrow that the commander shot last night.
This interested him so much that he shot many more arrows at this stone, but they all flew without scratching the surface. Then the commander realized:
The arrow penetrates the stone if the aim is perfect.