我们实现明天的唯一限制将是我们今天的怀疑。
The only limit to our realization of tomorrow will be our doubts of today.
The advantages found in history seem to be of three kinds, as they result either from the mere situation of the climate and country or from the form of government and of the character of the people, or from those finer principles and morals, which may be called the recommendations of philosophy.
写作是那些没有写作就无法生活的人的职业。
Sustainability isn’t a trend—it’s the future. Those who ignore it will be left behind.