Related:

• Remember that man's life lies all within this present, as 't were but a hair's-breadth of time
  as for the rest, the past is gone, the future yet unseen....
• Remember that what pulls the strings is the force hidden withi
  here lies the power to persuade, there the life,--there, if one must speak out, the real man....
• Deem not life a thing of consequence. For look at the yawning void of the future, and at that other limitless space, the past.
  -- Marcus Aurelius Antoninus (121-180 AD) -- Meditations, iv, 50...
• The future is no more uncertain than the present.
• Man spends his life in reasoning on the past, in complaining of the present, in fearing the future.
  -- Antoine Rivarol...
• The future lies ahead. The past lies, lies, lies...
• That which makes the man no worse than he was makes his life no worse
  it has no power to harm, without or within....
• Trust no future, howe'er pleasant! Let the dead Past bury its dead!
  Act, act in the living present! Heart within, and God o'erhead!...
• Execute every act of thy life as though it were thy last. -- Marcus Aureliu