To improve is to change; to be perfect is to change often.

There is nothing wrong with change, if it is in the right direction

To improve is to change. To be perfect is to have changed alot.

To improve is to change; to be perfect is to change often.

Some men change their party for the sake of their principles; others their principles for the sake of their party.

A fanatic is one who can't change his mind and won't change the subject.