The concept is interesting and well-formed, but in order to earn better than a 'C', the idea must be feasible.
Yale University management professor in response to student Fred Smith's paper proposing reliable overnight delivery service (Smith went on to found Federal Express Corp.)

There is no future in any job. The future lies in the man who holds the job.
George Crane 

This is a test. It is only a test. Had it been an actual job, you would have received raises, promotions, and other signs of appreciation.
Anonymous 

When people go to work, they shouldn't have to leave their hearts at home.
Betty Bender 

Whenever you are asked if you can do a job, tell 'em, "Certainly, I can!" Then get busy and find out how to do it.
Theodore Roosevelt 

Work is a four-letter word.
The Smiths (Morrissey)

Work is the refuge of people who have nothing better to do.
Oscar Wilde (1854-1900)