The Da Vinci Notebooks at sacred-texts.com
  Movement will cease before we are
  weary
  of being useful.
  Movement will fail sooner than usefulness.
  Death sooner than        I am never weary   of
  weariness.               being useful,
  In serving others I      is a motto for carnval.
  cannot do enough.        Without fatigue.
  No labour is
  sufficient to tire me.
  Hands into which
  ducats and precious
  stones fall like snow; they
  never become tired by serving,
  but this  service is only for its
  utility and not for our      I am never weary
  own benefit.                 of being useful.
  Naturally
  nature has so disposed me.