The most difficult thing in painting is to be simple.

精神错乱：一遍又一遍地重复作同一件事，而期待会有不同的结果。

The true value of a forest isn't measured in board feet, but in biodiversity and carbon sequestration.

学习达到快乐的境界就成功了。

Writing is a way of life, a way of being in the world.

解释：阻塞老百姓的嘴，好比阻塞河水。河流如果堵塞后一旦再决堤，伤人一定很多，人民也是这样。不可堵塞民众的言论，不给他们发表自己想法的机会。如这样去做，将比堵塞江河带来的后果更严重。