Tertullian

“ You therefore, who seek after their fashion, looking to those who are themselves ever seeking, a doubter to doubters, a waverer to waverers, must needs be “led, blindly by the blind, down into the ditch.” ”

“ For since they are still seekers, they have no fixed tenets yet; [19] and being not fixed in tenet, they have not yet believed; and being not yet believers, they are not Christians. But even though they have their tenets and their belief, they still say that inquiry is necessary in order to discussion. [20] Previous, however, to the discussion, they deny what they confess not yet to have believed, so long as they keep it an object of inquiry. When men, therefore, are not Christians even on their own admission, [21] how much more (do they fail to appear such) to us! ”