Related:

• No one is fit to be trusted with power. ... No one.
  ... Any man who has lived at all knows the follies and wickedness he's capable of....
• One who does not know a burro from a burrow does not know his ass from a hole in the ground!
• When one does not know what to say, it is a time to be silent.
• So much one man can do, That does both act and know.
  -- Andrew Marvell (1620-1678) -- Upon Cromwell's return from Ireland...
• If one does not know to which port one is sailing, no wind is favorable. -- Seneca (the Younger)
• How many husbands -- does it take to change a light bulb?
  We'll know as soon as one gets off the couch and does it....
• One expresses well the love he does not feel. -- J. A. Ka
• Polaroid does it in one step.
• How many Contras -- does it take to change a light bulb?
  Only one, but he doesn't know where it came from....