谁的快乐最廉价，谁就是最富有的人。
A man is rich in proportion to the number of things which he can afford to let alone. That man is the richest whose pleasures are the cheapest.
I always tell people, if you want to be successful, find someone who has achieved the results you want and copy what they do and you'll achieve the same results.
每一个挑战都是学习和改进的机会。