Some books are like parents, grandparents or old friends. They have been with us from our earliest days and one treats them almost with familiarity. They belong to one's youth and the recognition that they have been around for months and years keeps company with surprise. For philosophers such a book is A. J. Ayer's Language, Truth and Logic, first published over fifty years ago in 1936. There is a sense in which a similar point may be made about some individuals, but discretion and good manners should deter us from succumbing to the philosophical disease of pressing an analogy too far. Suffice it to say that over a period during which most English speaking philosophers were content (or perhaps constrained) to work within a context which was significantly influenced by Ayer's clear and cajoling formulation of a twentieth century of empiricism, F. C. Copleston provided one of the few distinctive alternative philosophical perspectives on major metaphysical questions. This essay will reflect upon the influence of Ayer's Language, Truth and Logic some fifty years after its publication, upon the philosophical discussion of religion and theological questions.