"The past is a candle at great distance: too close to let you quit, too far to comfort you."
我旅行得越多,就越确信世界充满了奇迹,而人类只是大自然浩瀚中的一粒尘埃。
教授数学是为了激励下一代的思考者和问题解决者。
The best stock to buy is the one you already own.