All scripture isgiven by inspiration of God, and is profitable of doctrine, for reproof, for correction, for instruction in righteousness.

-Bible (NewTestament)
  Timothy 3:16.

The tygers of wrath are wiser than the horses of instruction.

-Blake,William
  The Marriage of Heaven and Hell,'Proverbs of Hell'.

All true histories contain instruction; though in some, the treasure may be hard to find, and when found, so trivial in quantity that the dry, shrivelled kernel scarcely compensates for the trouble of cracking the nut.

-Bronte«  , Anne
  Agnes Grey, ch.1.

Now there is one outstandingly important fact regarding Spaceship Earth, and that is that no instruction book came with it.

-Fuller, R(ichard) Buckminster
  Operating Manual for Spaceship Earth, ch.4.

Efficiency†is measured at the extremities.You do not find the efficiency of an army at headquarters, nor of a firminhead office.It isattheremotest pointötheprivate soldier or humble legionary on the distant frontier, the girl at the counter or the branch-office junior salesman öthat the really decisive test of an army or a firm is made.It istherethat all theinstructionand knowledge of relevant facts and procedural disciplines bear fruitöor wither on the tree.

-Jay, SirAntony Rupert
  Management and Machiavelli.

Neither talent without instruction, nor instruction without talent can produce the perfect craftsman.

-Vitruvius full name MarcusVitruviusPollio   c.70
c.25  BC  On Architecture.