Related:

• Military secrets are the most fleeting of all. -- Spock, "The Enterprise Incident," stardate 5027.
  4....
• This world is all a fleeting show, For man's illusion give
  The smiles of joy, the tears of woe, Deceitful shine, deceitful flow,-- There 's nothing true but Heaven....
• Time, because it is so fleeting, time, because it is beyond recall, is the most precious of human goods and to squander it is the most delicate form of dissipation in which man can indulge.
  -- W. Somerset Maugham (1874-1965), "The Bum...
• He then learns that in going down into the secrets of his own mind he has descended into the secrets of all minds.
  -- Ralph W. Emerso...
• Accurate reckoning -- the entrance into the knowledge of all existing things and all obscure secrets.
  -- Ahmes the Scribe (17th cent. B.C.)...
• Fame may be fleeting but obscurity is forever.
• The cat is the most ruthless, most terrifying of animals.
  As far back as the sabertooth tiger. -- Spock, "Catspaw," stardate 3018.2....
• You've gathered all my secrets, and I don't know who I am.
• Thus heavenly hope is all serene, But earthly hope, how bright soe'er, Still fluctuates o'er this changing scene, As false and fleeting as 't is fair.
  -- Reginald Heber (1783-1826) -- On Heavenly Hope and Earthly Hope...