Alfred J. Ayer

The traditional disputes of philosophers are, for the most part, as unwarranted as they are unfruitful.

The fact that people have religious experiences is interesting from the psychological point of view, but it does not in any way imply that there is such a thing as religious knowledge...Unless he can formulate his "knowldege" in propositions that are empirically verifiable, we may be sure that he is deceiving himself.