《在陆军军官学校开学典礼的演说》(1924年6月16日)
Forests are the lungs of the earth, and we must protect them with the same urgency as our own health.
The greatest use of life is to spend it for something that will outlast it.
我们之所以能够区分远处看到的模糊形状和颜色,是因为我们的眼睛的能力。