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LDE ENGL1721


A Treatise on Painting, by Leonardo da Vinci
1721
Senex and Taylor, London


Chapter

LDE T0080   CID20  The Absurdity of meddling with the Practice, before having mastered the Theory

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Those who venture on the Practice, without first qualifying themselves in the Theory, are like Mariners putting out to Sea without either Helm or Compass, Ignorant what Course to take. The Practice ought always to be built on a Rational Theory, of which Perspective is both the Guide and the Gate, and without which, it is Impossible to succeed either in Designing, or in any of the Arts depending thereon.