Mathematics is not a spectator sport. You have to do it to understand it.
幸福的唯一途径是做真实的自己。
教育者必须是一位心理学家,以便理解儿童。
Leadership is not about being in charge. It's about taking care of those in your charge.
家中闲坐无聊,不妨想想,有人在为生活而辛劳;官位不能飞黄腾达,想想仍有许多才能好的读书人,人都老了还是青衣。