真理的概念在任何足够强大以包含算术的形式系统中都是不可定义的。
The notion of truth is not definable in any formal system that is strong enough to include arithmetic.
Psychology must be a practical science, concerned with the how and why of mental operations.
Philosophy is a battle against the bewitchment of our intelligence by means of language.
可持续性不是潮流,而是我们行业生存的必需。