One is the notion that knowledge is worth acquiring, all knowledge, and that a solid grounding in mathematics provides one with the essential language of many of the most important forms of knowledge. The third theme is that, while it is desirable to live peaceably, there are things worth fighting for and values worth dying for--and that it is far better for a man to die than to live under circumstances that call for such sacrifice. The fourth theme is that individual human freedoms are of basic value, without which mankind is less than human.63