Tennis is a mental game. Everyone is fit, everyone hits great forehands and backhands – it’s the upstairs that counts.
做伟大工作的唯一方法就是热爱你所做的事情。
世界是一面镜子,它向你展示你带给它的东西。
森林的真正价值在于它平衡生态需求与人类愿望的能力。
《三民主义·民权主义·第二讲》(1924年3月16日)
Most people overestimate what they can do in one year and underestimate what they can do in ten years.