Sometimes the most profound mathematics comes from playing with simple ideas until they reveal their hidden complexity.
引力解释了行星的运动,但它无法解释是谁让行星运动起来的。
改变你的思想,你就改变了你的世界。
可持续性不是一种趋势;它是我们对下一代的责任。
The only philosophy which can be responsibly practiced in face of despair is the attempt to contemplate all things as they would present themselves from the standpoint of redemption.