Related:

• Whenever you cut your fingernails, you will find a need for them an hour later. -- Witten's Law
• Witten's Law: Whenever you cut your fingernails you will find a need for them an hour later.
• If at first you don't succeed, destroy all evidence that you tried.
• If you need four screws for the job, the first three are easy to find. The N-1 Law
• I'll play it first and tell you what it is later.
• You will engage in a profitable business activity. Later the police will find out.
• If at first you don't succeed, find someone to blame it on.
• If you are searching for yourself. Find a mirror first!
• There 's no such thing in Nature; and you 'll draw A faultless monster which the world ne'er saw.
  -- Sheffield, Duke of Buckinghamshire (1649-1720) -- Essay on Poetry...