我唯一知道的是我一无所知。
The only thing I know is that I don't know anything.
不要等待完美的时刻。抓住这一刻,让它变得完美。
The causal framework is the foundation of scientific reasoning.
凡事天下要考察有无的原则,必定是以众人的耳目所见所闻的实情以知有与无来作为标准的。