勇气并不意味着你不害怕，而是你不让恐惧阻止你。
Courage doesn’t mean you don’t get afraid. Courage means you don’t let fear stop you.
A key insight in learning theory is that the complexity of a hypothesis class is crucial for generalization.
我想把美国从恐惧中解放出来。我希望人们能自由地表达自己。