The only thing greater than the power of the mind is the courage of the heart.
唯一比思想的力量更伟大的是心灵的勇气。
在数学中,提出问题的艺术必须比解决问题更有价值。
In the short run, the market is a voting machine but in the long run, it is a weighing machine.
La poesía es el eco de la melodía del universo en el corazón de los humanos.