Letter 65 — On the First Cause (§13)

“Do you maintain that form is a cause? This is only what the artist stamps upon his work; it is part of a cause, but not the cause. Neither is the pattern a cause, but an indispensable tool of the cause. His pattern is as indispensable to the artist as the chisel or the file; without these, art can make no progress. But for all that, these things are neither parts of the art, nor causes of it.”