The study of mathematics is a constant dialogue between the concrete and the abstract.

The first fruit of this imagination—and the first lesson of the social science that embodies it—is the idea that the individual can understand his own experience and gauge his own fate only by locating himself within his period, that he can know his own chances in life only by becoming aware of those of all individuals in his circumstances.

预测未来的最好方式就是创造未来。

科学无法解决自然的最终奥秘。这是因为，最终我们自己也是自然的一部分，因此也是我们试图解决的奥秘的一部分。