人们并不总是理性的，他们的非理性行为可能会产生重大的经济后果。
The world is full of people who have never, since childhood, met an open doorway with an open heart.
The night is my canvas, and the music is my paint.
What is most personal is most universal.
La lectura es un diálogo silencioso entre el autor y el lector.
学习数学的最好方法就是去做数学。