History has neither the desire nor the capacity to make men better or worse; it merely records what they have been and what they have done.
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。
A mind needs books as a sword needs a whetstone if it is to keep its edge.