Purposely.

van Gogh, Flowerpot with Chives, 1887

I expect to be drawing a lot more. It's good and hot already, I can tell you.

I must add an order for colours to this, though in case you'd rather not get them at once, I can do a few more drawings and it will not be time wasted. Also, I divided the order in two, according to what is more or less urgent.

What is always urgent is the drawing, and whether you do it straight off with the brush or with something else, say a pen, you never get enough done.

I am trying now to exaggerate the essential, and purposely leave the obvious things vague.

Vincent van Gogh, from a letter to Theo van Gogh, 26 May 1888