“Fourthly, the number of professing members is also proposed as a distinguishing mark. This, however, has not so much as a semblance of validity. The Mohammedan religion has incomparably more professors. At the time of Arius, everyone was amazed that the world had so soon turned Arian. In Rev 13:3 we read that the entire earth will follow the beast. The church, on the contrary, is most often a little flock (Luke 12:32), and the way to heaven is traversed by only a few (Matt 7:14)” (Wilhelmus a’Brakel, The Christian’s Reasonable Service).
This quote does not imply endorsement of a’Brakel as a true Christian.