永远不要停止学习，因为世界永远不会停止变化。
Never stop learning, because the world never stops changing.
The only limits that exist are the ones you place on yourself.
The first erroneous assumption is that quality means goodness, or luxury, or shininess, or weight. Quality means conformance to requirements.
——在广州全国青年联合会演说，1923年10月21日
The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways.
预测未来的最好方法就是创造未来。