Of The Mistakes Made By Those Who Practise Without Knowledge

leonardo-da-vinci-self-portrait“Those who are in love with practise without knowledge are like the sailor who gets into a ship without a rudder or compass and who never can be certain whether he is going. Practise must always be founded on sound theory, and to this Perspective is the guide and the gateway; and without this nothing can be done well…” – Leonardo da Vinci; Prolegomena and General Introduction To The Book On Painting – Clavis sigillorum

Taken from the collected folios of Leonardo’s personal notebooks.


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