Related:

• In order for something to become clean, something else must become dirty.
  -- Imbesi's Law of the Conservation of Filth . . ....
• Imbesi's Law with Freeman's Extension: In order for something to become clean, something else must become dirty
  but you can get everything dirty without getting anything clean....
• To get something clean, one has to get something dirty.
  To get something dirty, one does not have to get anything clean....
• Whenever you set out to do something, something else must be done first.
  -- Murphy's Law Corollary 6...
• One must become aware of one's legs in order to become more stable. -- Deng Ming-Dao
• The bottle is full. You must empty it before you put something else in.
• Murphy's (First) Corollary: Whenever you set out to do something, something else must be done first.
• Patry's Law: If you know something can go wrong, and take due precaution to prevent it, something else will go wrong.