Nicene and Post-Nicene Fathers, Vol. III:
Doctrinal Treatises of St. Augustin: Section 15

15. Put the case that we have not as yet heard a teacher of any religion. Lo we have undertaken a new matter and business. We must seek, I suppose, them who profess this matter, if it have any existence. Suppose that we have found different persons holding different opinions, and through their difference of opinions seeking to draw persons each one to himself: but that, in the mean while, there are certain pre-eminent from being much spoken of, and from having possession of nearly all peoples. Whether these hold the truth, is a great question: but ought we not to make full trial of them first, in order that, so long as we err, being as we are men, we may seem to err with the human race itself?