Don't change horses in the middle of a stream.
There is nothing permanent except change.
Everyone thinks of changing the world, but no one thinks of changing himself.
The world hates change, yet it is the only thing that has brought progress.
All change is not growth; all movement is not forward.
The only certainty is that nothing is certain.
To be absolutely certain about something, one must know everything -- or nothing -- about it.
Censorship reflects a society's lack of confidence in itself.
The chief business of the American people is business.
Second thoughts are wisest.