"The tree which moves some to tears of joy is in the Eyes of others only a Green thing that stands in the way. Some See Nature all Ridicule & Deformity, & by these I shall not regulate my proportions: & Some Scarce see Nature at all. But to the Eyes of the Man of Imagination, Nature is Imagination itself. As a man is, So he Sees. As the Eye is formed, such are its Powers".
Letter to Dr. Trusler (23 August 1799)
This quote appears in the Book Pharmacophilia or The Natural Paradise. Jonathan Ott, 1997.