[ Whatever is made by the hand of man, by the hand of man may be overturned. ]

[T]hat which is man-made can be unmade.

Things are done quickly enough if done well. If just quickly done they can be quickly undone.

He'd undone all he could. You can be sorry, and you can be forgiven, but you can't call back the futures that your bad decisions lost. He didn't need no philosopher to tell him that.

Leave undone whatever you hesitate to do.

What you have done to this point cannot be undone. What you do next... It is still unwritten.

What is done cannot be undone, but one can prevent it happening again.

Whatever can be done another day can be done today.

whatever is done cannot be undone, but whatever is lost can sometimes be found.

Who can undo
What time hath done? who can win back the wind?
Beckon lost music from a broken lute?
Renew the redness of a last year's rose?
Or dig the sunken sunset from the deep?

Anything that can be accomplished chemically can be accomplished in other ways.

Anything is possible. Anything can be.

If a thing is right, it can be done, and if it is wrong, it can be done without; and a good man will find a way.

A Policy may be reversed: History cannot.