There are two freedoms - the false, where a man is free to do what he likes; the true, where he is free to do what he ought.
尘土承受屈辱,却以鲜花来回报。
My expectations were reduced to zero when I was 21. Everything since then has been a bonus.
I had ambition not only to go farther than any man had been before, but as far as it was possible for a man to go.
The future of forestry lies in technology, but it must serve nature, not exploit it.