The most profound discoveries in mathematics often come from the simplest observations.
Never stop learning. The moment you think you know it all is the moment you fail.
To be Irish is to know that in the end the world will break your heart.
教育是老年人的最佳粮食。
在深冬里,我终于明白,在我内心深处有一个不可战胜的夏天。
Sustainability isn't a trend—it's the future of food production.