Related:

• A liar isn't believed even when he speaks the truth.
• When your work speaks for itself, it is very wise to remain silent and not interrupt!
  -- Henry J. Kaise...
• Most people know how to keep silent but few of us know when.
• A poet is a kind of liar who always speaks the truth.
• Turlough speaks the truth, Doctor. -- Kamelion, "Caves of Androzani.
• lurker n. One of the `silent majority' in a electronic forum
  one who posts occasionally or not at all but is known to read the group's postings regularly....
• We are often most in the dark when we are the most certain, and most enligthened when we are the most confused.
  -- M. S. Peck...
• When people are least sure, they are often most dogmatic. -- John Kenneth Galbraith
• He that speaks truth must have one foot in the stirrup. Turkish Proverb