“There are times when we must sink to the bottom of our misery to understand truth, just as we must descend to the bottom of a well to see the stars in broad daylight.”

“Vision is not enough, it must be combined with venture. It is not enough to stare up the steps, we must step up the stairs.”

“Man is not an omipotent master of the universe, allowed to do with impunity whatever he thinks, or whatever suits him at the moment. The world we live in is made of an immensely complex and mysterious tissue about which we know very little and which we must treat with utmost humility.”

“Without a global revolution in the sphere of human consciousness, nothing will change for the better in the sphere of our being as humans, and the catastrophe toward which this world is headed — be it ecological, social, demographic or a general breakdown of civilization — will be unavoidable. If we are no longer threatened by world war or by the danger that the absurd mountains of accumulated nuclear weapons might blow up the world, this does not mean that we have definitely won. We are still incapable of understanding that the only genuine backbone of all our actions, if they are to be moral, is responsibility.”

“The kind of hope that I often think about…I understand above all as a state of mind, not a state of the world.Either we have hope within us, or we don’t. It is a dimension of the soulIt’s not essentially dependent upon some particular observation of the world or estimate of the situation.Hope is not the conviction that something will turn out well, but the certainty that something makes sense, regardless of how it turns out.”

“In any case, ideals are something we strive for; they are somewhere on the horizon of our efforts; they provide meaning and direction; they are not, however, static quotas that we either fulfill or do not.”

“At one time, the state of culture in Czechoslovakia was described, rather poignantly, as a 'Biafra of the spirit'. . . I simply do not believe that we have all lain down and died. I see far more than graves and tombstones around me. I see evidence of this in . . . expensive books on astronomy printed in a hundred thousand copies (they would hardly find that many readers in the USA) . . .”