"The Life of the Mind: The Groundbreaking Investigation on How We Think"
The fact that millions of people share the same vices does not make these vices virtues, the fact that they share so many errors does not make the errors to be truths, and the fact that millions of people share the same form of mental pathology does not make these people sane.
also I know several aliens and most of them are not demons. they are fine upstanding citizens who contribute to society in several interesting and non controversial ways that blur the edge between sanity and the outer dimensions.
Perhaps it is better to be un-sane and happy, than sane and un-happy. But it is the best of all to be sane and happy. Whether our descendants can achieve that goal will be the greatest challenge of the future. Indeed, it may well decide whether we have any future.