万物起源的奥秘对我们来说是无法解决的；而我必须满足于做一个不可知论者。

真正的圣贤，决不是愚腐不化。真正的豪杰也绝不是粗鲁疏略。

Innovation in forestry begins with respect for nature.

"Writing is a way of talking without being interrupted."

The balance between energy needs and environmental protection is the challenge of our time.

冒险本身就是值得的。

预测未来的最好方法就是创造它。