我相信讲故事的力量可以改变世界。

The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all.

要享受自由，我们必须控制自己。

四元数的诞生，如同几何、代数、形而上学和诗歌这四位父母的奇特后代。