It is better to be unhappy in love than unhappy in marriage, but some people manage to be both.
The most profound discoveries in mathematics often come from the simplest observations.
Only by continuous learning can we make continuous progress.
生命的伟大用处在于将其用于一些能够超越它的事物。
All mankind is in a perpetual and restless desire for power after power that ceaseth only in death.