解读：读书不是单纯为功名利禄，而是在遭遇挫折、低谷时，书中智慧、精神能化作内心支撑，助我们咬牙挺过艰难时刻。

In mathematics, the most profound ideas often arise from the simplest observations.

Les chères mains qui furent miennes.

The greatest happiness is to know the source of unhappiness.

建筑的美在于它的诚实。