最难的事情是变得简单。

The way in which men produce their means of subsistence depends first of all on the nature of the actual means they find in existence and have to reproduce.

Play is the language of childhood, and books should speak that language too.

The most sustainable quarry is the one that balances production with environmental stewardship.

在将失败视为前进一步的环境中，创新才能蓬勃发展。

Sometimes the hardest thing and the right thing are the same.

电影是使不可见变为可见的艺术。