A pessimist is a man who looks both ways when he crosses the street.
Fortune knocks but once, but misfortune has much more patience.
The incompetent with nothing to do can still make a mess of it.
May your happiest days of the past be your saddest days of your future.
Middle age is when you stop criticizing the older generation and start criticizing the younger one.
In a hierarchy every employee tends to rise to his level of incompetence ... in time every post tends to be occupied by an employee who is incompetent to carry out its duties ... Work is accomplished by those employees who have not yet reached their level of incompetence.