“If we want to set out on the aruous search for the truth, we must all summon up the courage to leave the lines along which we have thought until now and as the first step begin to doubt everything that we previously accepted as correct and true. Can we still afford to close our eyes and stop up our ears because new ideas are supposed to be heretical and absurd?”

“Not until we have taken a look into the future shall we be strong and bold enough to investigate our paste honestly and impartially”

“Could it be that God was an extra-terrestrial? What do we mean when we say that heaven is in the clouds? From Jesus Christ to Elvis Presley, every culture tells us of high-flying bird men who zoom around the world creating magnificent works of art and choosing willing followers to share in the eternal glory from beyond the stars. Can all these related phenomena merely be dismissed as coincidence?”

“Wichtigtuer sind zwar zu gut erzogen, um mit vollem Mund zu sprechen. Aber sie haben keine Bedenken, es mit leerem Kopf zu tun.”

“Erão os Deuses Astronautas?”

“We forget that, although each of the liberties which have been won must be defended with utmost vigour, the problem of freedom is not only a quantitative one, but a qualitative one; that we not only have to preserve and increase the traditional freedom, but that we have to gain a new kind of freedom, one which enables us to realize our own individual self; to have faith in this self and in life.”

“We may know ourselves, and yet even with all the efforts we make, we do not know ourselves. We know our fellowman, and yet we do not know him, because we are not a thing, and our fellowman is not a thing. The further we reach into the depths of our being, on someone else's being, the more the goal of knowledge eludes us.”