That neither our thoughts, nor passions, nor ideas formed by the imagination, exist without the mind, is what every body will allow.
To live without experiencing some of the most beautiful relations life affords is not to have lived at all.
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。
The growth of an enterprise is a process of continuous trial and error.