Regarding the nature of the so-called "scientific philosophy", Pieper explains that "The most direct formulation is found in the positivist manifesto, Wissenschaftliche Weltauffassung ["The Scientific World View"], of the early Vienna Circle: "What is, is on the surface; everything is accessible to human perception." Thus it is nonsensical so much as to search for a "root" of all things or for their "ultimate reasons". In short, that mysterious object of philosophy is nonexistent. Only the objects of science are real; they are, in strict sense and without exception, the objects of perception."
~Josef Pieper: In Defense of Philosophy, Ch. 1. (Ignatius Press)
