Leonardo da Vinci Quote

Source/Notes: Variant: "He who in reasoning cites authority is making use of his memory rather than of his intellect. " - Thoughts on Art and Life by Leonardo da Vinci (Merrymount Press, 1906 edition), p. 11
Source/Notes: The Notebooks of Leonardo Da Vinci, translated by Jean Paul Richter (1888), I - Prolegomena and General Introduction to the Book on Painting