"There are usually two motives behind any censorship- good and bad. The good motive is the desire of the authorities to safeguard and strengthen the community, particular in times of stress. The bad motive is the desire of the authorities to suppress criticism, particular of themselves. Both these motives existed in 1644, as they do in 1944. ... The fact is we are willing enough to praise freedom when she is safely tucked away in the past and cannot be a nuisance. In the present, amidst dangers whose outcome we cannot forsee, we get nervous about her, and admit censorship. Yet the past was once the present, the seventeenth century was once “now”, with an unknown future, and Milton , who lived in his ‘now’ as we do in ours, believed in taking risks.”
E M Forster, "Two cheers for democracy"