事实是，最多人的最大幸福是衡量对与错的标准。
The said truth is that it is the greatest happiness of the greatest number that is the measure of right and wrong.
I'm not perfect, but I'm always striving to be better.
The unity of mathematics is not imposed but discovered.
为儿童写作的秘诀是记住做孩子的感觉。
"La vida es una serie de momentos que se convierten en recuerdos."
财富不应该集中在少数人手中，而应该通过公正的竞争分配给所有人。
The most profound art often emerges from the tension between tradition and innovation.