The existence of the natural world is the same kind of fact as the existence of any proposition.
最有力的艺术往往源于最简单的想法。
所谓意念诚实,就是说不要自己欺骗自己,像厌恶难闻气味那样厌恶邪恶,像喜爱美丽的女子一样喜爱善良,这样才能说心安理得,所以君子在一个人独处时必定要谨慎。
No matter how complex or refined, all behavior is to be explained in terms of stimulus and response.