On the African prairie, there is an animal called vampire bat. Although small, it is a natural enemy of wild horses. This bat often lies on the horse's leg, quickly bites the wild horse's leg with sharp teeth, and then sucks blood with its sharp mouth. No matter how wild horses jump and run, they can't drive away bats because they are too small. Unlike lions, tigers and wolves, wild horses can run with their hooves and hit with their bodies. Bats can stand on wild horses with their heads on the ground and let them die helplessly in anger and bleeding.

Voltaire: "It is not the distant mountains that make people tired, but a grain of sand in their shoes. On the road of life, it is necessary for us to learn to pour the sand out of our shoes at any time. " When something is too small to be your opponent, you should be more careful. In real life, sometimes it's not the great challenges that crush you, but some trivial things. Many people have had this experience; When a disaster strikes suddenly, people often instinctively produce a great resistance because of fear and tension. However, when you are troubled by trifles, you may be at a loss, because they are the details of life. However, these seemingly trivial things can consume people's energy endlessly, just as vampire bats can kill a powerful life.

Think of one of my own arguments: those who achieve great things must exercise restraint and emphasize the importance of sand. Just give an example to illustrate your point of view.