生活对我们任何人来说都不容易。但那又怎样?我们必须有毅力,最重要的是对自己有信心。我们必须相信我们在某方面是有天赋的,而且这个目标必须实现。
林业的未来在于可持续实践,平衡经济增长与环境管理。
数学之美在于它能够揭示现实的隐藏结构。
The great secret that all old people share is that you really haven't changed in seventy or eighty years. Your body changes, but you don't change at all. And that, of course, causes great confusion.
艺术家必须是精神的战士。
When angry, count ten before you speak; if very angry, a hundred.