“What is drawing? How does one get there? It’s working one’s way through an invisible iron wall that seems to stand between what one feels and what one can do.
“How can one get through that wall? — since hammering on it doesn’t help at all. In my view, one must undermine the wall and grind through it slowly and patiently. … the great isn’t something accidental; it must be willed.”
— Vincent van Gogh, letter to Theo, 22 October 1882.