宇宙不仅比我们想象的更奇怪，它比我们能想象的还要奇怪。
Fearless is not the absence of fear. It's not being completely unafraid. Fearless is having fears. Fearless is having doubts. Lots of them. Fearless is living in spite of those things, every day.
Every mental state exists for a purpose; to understand it, we must ask what function it serves in the broader system of behavior.
世界不是关于竞争，而是关于合作。