t.1
Thomas Nagel於1987年出版的小冊子《What Does It All Mean?》，不知道現在還有多少人記得。這是一本哲學入門書，把讀者帶入一個充滿了無數個問號的世界，卻又不公佈任何答案，而只是啟發思考。下面這段話很淺顯，算是我童年時期的哲學啟蒙了，但其實觸及了epistemology和ontology：

If you think about it, the inside of your own mind is the only thing you can be sure of. Whatever you believe — whether it's about the sun, moon, and stars, the house and neighbourhood in which you live, history, science, other people, even the existence of your own body — is based on your experiences and thoughts, feelings and sense impressions. That's all you have to go on directly, whether you see the book in your hands, or feel the floor under your feet, or remember that George Washington was the first president of the United States, or that water is H2O. Everything else is farther away from you than your inner experiences and thoughts, and reaches you only through them.

後續兩段也非常精彩，見附圖。高亮是我自己加上的。