Cleaning anything involves making something else dirty, but anything can get dirty without something else getting clean.
Middle age is when anything new in the way you feel is most likely a symptom.
Many live by their wits but few by their wit.
Peter's Principle: In an organization, each person rises to the level of his own incompetence.
In a hierarchy, every employee tends to rise to his level of incompetence.
You shouldn't punish others for your own choices.