The mind is not a vessel to be filled, but a fire to be kindled.
假如我能遇见你，经年之后，我将如何与你招呼，以眼泪，以沉默。
幽默是与孩子建立联系的最佳方式。
The principles of conditioning apply equally to all species.
Mathematical intuition is like a muscle - it grows stronger with exercise.
世界因你的榜样而改变，而非你的意见。