A consistent soul believes in destiny, a capricious one in chance.
Success is a product of unremitting attention to purpose.
The more extensive a man's knowledge of what has been done, the greater will be his power of knowing what to do.
Debt is a prolific mother of folly and of crime.
Quit the world, and the world forgets you.
It is remarkable that when great discoveries are effected, their simplicity always seems to detract from their originality: on these occasions we are reminded of the egg of Columbus!