For even if we have the sensation of being always enveloped in, surrounded by our own soul, still it does not seem a fixed and immovable prison; rather do we seem to be borne away with it, and perpetually struggling to pass beyond it, to break out into the world, with a perpetual discouragement as we hear endlessly, all around us, that unvarying sound which is no echo from without, but the resonance of a vibration from within.
