The correspondence between Theo van Doesburg and the Rinsema brothers provides a glimpse into their personal dilemmas at the time of great social changes. Things had to be more honest, more social and art more businesslike without embellishments. Straight lines, primary colors and a clear division of space. That it was not always easy is clear from their letters, written between 1915 and 1931, in which they discussed art, De Stijl, life and death.