Dear Does [= Theo van Doesburg ], thank you for your letter.. .I was glad to know that in principle you are in favour of the diamond hanging [Mondria… - Piet Mondrian

You should remember that my things are still intended to be paintings, that is to say, they are plastic representations, in and by themselves, not part of a building. Furthermore, they have been made in a small room. Also, that I use subdued colours for the time being, adapting myself to the present surroundings and to the outer world; this does not mean that I should not prefer a pure colouring. Otherwise you might think that I contradict myself in my work.

These universal means of expression were discovered in modern painting by a logical and gradual progress toward ever more abstract form and color. Once the solution was discovered, there followed the exact representation of relations alone, that is to say, of the essential and fundamental element in any plastic emotion of the beautiful.

If, then, we focus our attention on the balanced relation, we shall be able to see unity in natural things. However, there it appears under a veil. But even though we never find unity expressed exactly, we can unify every representation, in other words, the exact representation of unity can be expressed; it must be expressed, for it is not visible in concrete reality.