Every moment of one's existence one is growing into more or retreating into less.
我们从这样的假设开始:任何学科都可以以某种智力上诚实的形式有效地教给处于任何发展阶段的任何孩子。
名称的意义就是它的指称对象。
To live is the rarest thing in the world. Most people exist, that is all.
Challenges are opportunities in disguise; they push us to innovate and improve.