It is one thing to say that something should be done, but quite a different matter to do it.
He who plots to hurt others often hurts himself.
Don't let your special character and values, the secret that you know and no one else does, the truth - don't let that get swallowed up by the great chewing complacency.
Enemies' promises were made to be broken.
Uninvited guests are often most welcome when they leave
Do not attempt to hide things which cannot be hidden.