我們必需透過閱讀、聆聽、討論、觀察及思考來學習，我們絕不能忽視那些學習方法中的任何一種。我們大多數人的問題是沒有做到後者 – 思考 – 因為思考對人們來說是件困難的工作… 世界上所有的問題都可以輕易的被解決，只要人們願意思考。
We must study through reading, listening, discussing, observing and thinking. We must not neglect any one of those ways of study. The trouble with most of us is that we fall down on the latter – thinking – because it’s hard work for people to think… All of the problems of the world could be settled easily if men were only willing to think.
Men occasionally stumble over the truth, but most of them pick themselves up and hurry off as if nothing ever happened.