When a man is out of sight, it is not too long before he is out of mind.
The man who does not know other languages, unless he is a man of genius, necessarily has deficiencies in his ideas.
A day will come when markets, open to trade, and minds, open to ideas, will become the sole battlefield.
This book should be read as one would read the book of a dead man.
The wise man does not grow old, but ripens.
Genius: the superhuman in man.