伟大的真理，其反面同样是伟大的真理。
A great truth is a truth whose opposite is also a great truth.
艺术可以是重获历史的一种方式。
The study of the mind must be strictly empirical.
Man can only be free through mastery of himself.
Theoretically there is a perfect possibility of happiness: believing in the indestructible element within oneself, and not striving towards it.
The goal of mathematics is to understand the structures that underlie the phenomena we observe.