Even virtue is an art; and even its devotees are divided into those who practise it and those who are merely amateurs.
The poor never estimate as a virtue the generosity of the rich.
As far as your self-control goes, as far goes your freedom.
Distrust your judgment the moment you can discern the shadow of a personal motive in it.
You can sink so fast that you think you are flying.
Nobody knows enough, but many know too much.