数学不是沿着一条清理得很好的高速公路小心行进，而是一次进入陌生荒野的旅程，探险者常常会迷路。
Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.
The world is full of obvious things which nobody by any chance ever observes.
宇宙不仅比我们想象的更奇怪，而且比我们能够想象的还要奇怪。
在科学推断中，我们应该尽可能追求客观的方法。