生活是由选择构成的，而每一个选择都是一种放弃。
A vida é feita de escolhas, e cada escolha é uma renúncia.
"I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit."
如果你无法简单地解释它，说明你理解得还不够透彻。
生命中最伟大的事情是保持心灵年轻。