一个好计划的最大敌人是梦想一个完美的计划。坚持好的计划。

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.

Sustainability isn’t a choice—it’s the only path forward for any industry tied to natural resources.

我们必须建立一个没有经济支配、没有剥削、没有失业、没有战争的世界。

一幅画应该是通往另一个现实的窗口。