Black wrote the dissent when he used the church state separation wording.
http://worldnetdaily.com/news/article.asp?ARTICLE_ID=28567
"Justice Black was avidly anti-Catholic views "learned in the Ku Klux Klan" and which, no doubt, "influenced his 1947 ruling that the First Amendment created a 'high and impregnable' wall between religion and government," said the Times."