For the rest, nothing obliges us to accept these declarations as dogmas. There is no question here of a religion which imposes upon us its blind faith, its _Credo quia absurdum_. We are quite entitled to regard them as mere hypotheses, as immense, incomparable antediluvian poems, of which the Mosaic Genesis is but a disfigured fragment. But, even as hypotheses or poems, it must be admitted that they are prodigious, that we have nothing better, nothing more probable to set against them and that, in view of their incontestable antiquity, of their prehistoric origin, they seem really superhuman. Must we admit, as the occultists contend, that they come to us from beings superior to man, from more spiritual entities, living under unknown conditions, who occupied our earth or the neighbouring planets before our coming; from a Lemuro-Atlantean civilization which, in its megalithic monuments, has left indelible traces in the memory of the peoples and on the face of our earth? It is quite possible; but here again we are free to await the confirmations of Hindu, Egyptian, Chaldean, Assyrian and Persian archæology, which on this point, as on so many others, has not spoken its last word. 13 I am well aware that this revelation, as apparently all those which may be made in the course of time, dates back to and ends in the unknowable, the insoluble mystery of divinity, of being, or existence; and it necessarily stops short before the barrier of this unknowable, which is as impenetrable and impregnable as a cliff that is infinite in every dimension and formed of a single block of black diamond. There is nothing to be done; we can but halt; we cannot even seek to outflank it, to approach it from the other side, for the other side, if we could reach it, would necessarily be like the side in front of us, seeing that the non-existence of everything would be just as inexplicable, just as incomprehensible as its existence. It is true that, in the secret recesses of the doctrine, the universe and all that it contains is known as Maya, that is to say, the eternal illusion, so that the two irreconcilable mysteries unite in a still greater mystery which man’s intelligence can no longer approach.