生命中最伟大的事情是保持心灵年轻。

The historian must be impartial, but not indifferent.

The existence of a legal system depends on the acceptance of secondary rules by officials.

幸福是一种内在的工作。

The sea is a mirror of the soul—endless, shifting, and unfathomable.

科学家最强大的工具是开放的思维。