在我看来，自然界是最大的兴奋来源；最大的视觉美来源；最大的智力兴趣来源。它是生命中许多让生活有价值的东西的最大来源。
It seems to me that the natural world is the greatest source of excitement; the greatest source of visual beauty; the greatest source of intellectual interest. It is the greatest source of so much in life that makes life worth living.
The best fertilizer? A farmer's footsteps in the field.
Reading furnishes the mind only with materials of knowledge; it is thinking that makes what we read ours.
"In the face of overwhelming odds, the human spirit can still triumph."
In transgressing the law of nature, the offender declares himself to live by another rule than that of reason and common equity.