Metaphysics in and of itself will present a substantial barrier to modern ways of thinking; or perhaps what is more precise, the modern way of thinking erects a nearly impenetrable barrier between itself and metaphysics. The Western tradition even in its Greek origins is problematic in this way. For example, it is well-known that the Greeks had no notion of the Infinite, which is a fundamental metaphysical conception. And even today, in the Western world, when the infinite is mentioned, it is almost always a question of the indefinite, which is not the same thing. For example, there can be no such thing as an Infinite series of numbers, although it is possible to have an indefinite series. But the Western habit, out of a lack of comprehension of the true meaning of the Infinite, has been to label as ‘infinite’ everything the limit of which is not within its grasp. Concepts like number, as well as space or time, can only be indefinite in multitude or extension or duration. But the very fact that space is space, and not something else, prevents space, no matter how great in extent, and even if we are unable to determine its limit, from qualifying as Infinite. The Infinite must always be absolutely unconditioned.