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 transcend it, to break out into the world, with a perpetual discouragement as we hear endlessly all around us that unvarying sound which is not an echo from without, but the resonance of a vibration from within.