Mathematics is the most beautiful and most powerful creation of the human spirit.
The essence of poverty is that tomorrow’s uncertainties devour today’s possibilities.
Truth is the foundation of all great art.
对这个世界有所助益是获得快乐的唯一途径。
明白事理的人使自己适应世界;不明事理的人想使世界适应自己。所以,所有进步都要靠不明事理的人。