His Word and His Apostles' Word is intelligible to all. This is the most important point in the doctrine concerning the Church. Everything said in this little book is nothing, if the Apostles' Word, if Scripture, is not clear. Here is all danger. If here we conquer, we have won; if here we lose, then all is lost, and lost not for this or that particular Church only, but for the whole Christian Communion on earth. For if the Scriptures cannot be the point of union of the Church, then there is no point of union, because every other, in itself, without backing of Scripture is less than vanity. (pp. 29,30)
The rest of the chapter is well worth reading. It explains so well why the attack upon our Church and her confession must always begin with attacking the Scripture as the light that it is.