The essence of modernity is psychologism, the experiencing and interpretation of the world in terms of the reactions of our inner life and indeed as an inner world, the dissolution of fixed contents in the fluid element of the soul, from which all that is substantive is filtered and whose forms are merely forms of motion.

世界上最可靠的就是你自己。

You cannot always control what goes on outside. But you can always control what goes on inside.

在数学中，就像在生活中一样，最优雅的解决方案往往来自于对问题的深刻理解。

The beauty of mathematics lies in its simplicity and universality.