Psychology must be based on direct experience and introspection.
Most people overestimate what they can do in one year and underestimate what they can do in ten years.
人生是一次選擇的連續(xù)。
真理的概念在任何足夠強(qiáng)大以包含算術(shù)的形式系統(tǒng)中都是不可定義的。