Related:

• He who studies books alone will know how things ought to be
  and he who studies men will know how they are....
• A STATISTICIAN - One who draws a mathematically precise line from an unwarranted assumption to a foregone conclusion.
  -- THE ALL-PURPOSE BUSINESSMAN'S VOCABULARY...
• GENEALOGY: An account of one's descent from an ancestor who did not particularly care to trace his own.
  -- Ambrose Bierce...
• GENEALOGY, n. An account of one's descent from an ancestor who did not particularly care to trace his own.
  -- Ambrose Bierce, "The Devil's Dictionary...
• No one is unemployed who minds his own business.
• If there is any one proof of a man's incompetence, it is the stagnant mentality of a worker who
  doing some small routine job in a vast undertaking, does not care to look beyond the lever of a machine, does not choose to know how the machine got there or what makes his job possible, and proclaims that the management of the undertaking is parasitical and unneccessary....
• Artiformologicalintactitudinarianisminist One who studies 4-5 letter latin prefixes and suffixes.
• There was a college student trying to earn some pocket money by going from house to house offering to do odd jobs.
  He explained this to a man who answered one door....
• He who wishes to secure the good of others has already secured his own. -- Confucius.