‘We, who preach and write books, write in a manner altogether different from the manner in which the canon of Scriptures has been written. We write while we make progress. We learn something new every day. We dictate at the same time as we explore. We speak as we still knock for understanding. … I urge your charity, on my behalf and in my own case, that you should not take any previous book or preaching of mine as Holy Scripture. … If anyone criticises me when I have said what is right, he does not do right. But I would be more angry with the one who praises me and takes what I have written for Gospel truth (canonicum) than the one who criticises me unfairly.’
- Augustine, Sermon 347.62.Notice his assumption that it is wrong to criticise him when he is right, though worse to fail to criticise him when he is not. An interesting conundrum for his congregation.