Understanding nature’s complexity is the ultimate challenge.

要理解心智，我们必须先理解它的进化目的。

The most important thing in mathematics is to understand the concepts, not just to memorize formulas.

The trouble with most people is that they think with their hopes or fears or wishes rather than with their minds.

教育体系是以感官基础，以思考为过程，以自由为目的。