Da Vinci Notes #19 - Doing Without Knowledge

 

OF THE MISTAKES MADE BY THOSE WHO PRACTISE

WITHOUT KNOWLEDGE.

 

Those who are in love with practice without knowledge are like the

sailor who gets into a ship without rudder or compass and who never

can be certain whether he is going. Practice 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 in the matter of