A critical re-examination of the history of the concepts of space (includ- ing spacetime of general relativity and relativistic quantum field theory) reveals a basic ontological elusiveness of spatial extension, while, at the same time, highlight- ing the fact that its epistemic primacy seems to be unavoidably imposed on us (as stated by A.Einstein "giving up the extensional continuum ... is like to breathe in airless space"). On the other hand, Planck's discovery of the atomization of action leads to the fundamental recognition of an ontology of non-spatial, abstract enti- ties (Quine) for the quantum level of reality (QT), as distinguished from the nec- essarily spatio-temporal, experimental revelations (measurements). The elementary quantum act (measured by Planck's constant) has neither duration nor extension, and any genuinely quantum process literally does not belong in the Raum and time of our experience. As Heisenberg stresses: "Wahrend also die klassische Physik ein objectives Geschehen in Raum and Zeit zum Gegenstand hat, fur dessen Existenz seine Beobachtung vollig irrelevant war, behandelt die Quantentheorie Vorgange, die sozusagen nur in den Momenten der Beobachtung als raumzeitliche Phanomene auf- leuchten, und uber die in der zwischenzeit anschaulische physikalische Aussagen sin- loss sind". An admittedly speculative, hazardous conjecture is then advanced con- cerning the relation of such quantum ontology with the role of the pre-phenomenal continuum (Husserl) in the perception of macroscopically distinguishable objects in the Raum and time of our experience. Although rather venturesome, it brings together important philosophical issues. Coherently with recent general results in works on the foundations of QT, it is assumed that the linearity of quantum dynamical evolution does not apply to the central nervous system of living beings at a certain level of the evolutionary ramification and at the pre-conscious stage of subjectivity. Accordingly,