I already realized [that time] that only a new study of nature and a new attitude towards life would bring the much-needed renewal of German art. - Ernst Ludwig Kirchner

They [his 'Street Scene' paintings and drawings,he made in Berlin] originated in the years 1911-14, in one of the loneliest times of my life, during which an agonizing restlessness drove me out onto the streets day and night, which were filled with people and cars.

..how the movement of the passers-by [in his Street scene painting of 191-14] is comprehended in the rhombus of the heads which is twice repeated. In this way life and movement arise from an original geometric form. [Kirchner designed a diagram together with this line in the letter]

c. 1910; as quoted in: Der Blick auf Fränzi und Marcella: Zwei Modelle der Brücke-Künstler Heckel, Kirchner und Pechstein, Norbert Nobis; Sprengel Museum Hannover und Stiftung Moritzburg, 2011, p 17