O.K., actually it was a quote from Josef Muller-Brockmann in the article from iA on The 100% Easy-to-Read Standard: “The width of the column must be proportioned to the size of the type. Overlong columns are wearying to the eye and also have an adverse psychological effect. Overshort columns can also be disturbing because they interrupt the flow of reading and put the reader off by obliging the eye to change lines too rapidly.”