When they are among us cats are angels
It is always the best friends who are neglected and ignored.
Happiness lies in the consciousness we have of it.
There is only one sex. A man and a woman are so entirely the same thing that one can scarcely understand the subtle reasons for sex distinctions with which our minds are filled.
The brain is a tool that gets rusty without constant, albeit moderate, exercise.
The publication of a book only brings very paltry results to its author.