"In a letter to August Macke, from Sindelsdorf 12 April 1911; taken from [http://www.zeno.org/Kunst/M/Marc,+Franz/Briefe/Briefe+1897-1914/55.+Brief+an+August+Macke, (transl. F. Heijnsbroek)"
January 1, 1970
https://en.wikiquote.org/wiki/Franz_Marc