On the first day of school, Socrates（苏格拉底） told his students, "Today, we'll only learn one thing. That is to swing（甩动） your 1 forward and backward. "
He showed them and 2 a result all the students laughed. "Sir, is it also learned?" one of the students laughed. " Of course!You think this is a simple thing, but it 3 easy in fact. " Socrates replied 4 . Hearing this, the students laughed even harder.
Without being a little angry, Socrates said, "In this class I'll teach you how to learn this action well. After that, start today, 5 you will do it 100 times a day. "
At first, the students all swung their arms and said to 6 , "How easy and funny it is!" Ten days later, Socrates asked, "Who still sticks to swinging his arm?" About 80% of the students 7 their hands. Twenty days later, Socrates asked, "Who still keeps on swinging his arm?"About 50% of them put up their hands while the other students8 silent. Three months later, Socrates asked again. This time, 9 raised his hand except one student. He was Plato（柏拉图）.
Perseverance（坚持不懈） is the simplest yet most difficult thing in the world, because everyone can do it, but not everyone will do. Plato was very 10 just because of his perseverance. Only the one who can hold on a simple thing may make it.
