and taming the greater of the two and of bringing it closer to us; the quest will be the most difficult, the most mysterious and, in certain respects, the most dangerous that mankind has ever undertaken. But we can say to ourselves, without fear of being very far wrong, that it is the best task at the moment. In any case, this is the first time since man has existed that he will be fronting the unknown with such good weapons, even as it is also the first time since its awakening that his intelligence, which has reached a summit from which it can understand almost everything, will at last receive help from outside and hear a voice that is something more than the echo of its own.