There are two kinds of failures: those who thought and never did, and those who did and never thought
Many an optimist has become rich simply by buying out a pessimist.
Bureaucracy defends the status quo long past the time when the quo has lost its status.
Everyone rises to their level of incompetence.
Lead, follow or get of the way
Cleaning anything involves making something else dirty, but anything can get dirty without something else getting clean.