Sooner or later you must move down an unknown road that leads beyond the range of the imagination and the only certainty is that the trip has to be made.

It took me less than half a lifetime to realize that regret is one of the few guaranteed certainties. Sooner or later everything is touched by it despite our naive and senseless hope that just this time we will be spared its cold hand on our heart.

Hope is not the conviction that something will turn out well but the certainty that something makes sense regardless of how it turns out.

Isn't it the moment of most profound doubt that gives birth to new certainties? Perhaps hopelessness is the very soil that nourishes human hope perhaps one could never find sense in life without first experiencing its absurdity.

Hope is definitely not the same thing as optimism. It is not the conviction that something will turn out well but the certainty that something makes sense regardless of how it turns out.

Uncertainty is the refuge of hope.

It is in the admission of ignorance and the admission of uncertainty that there is a hope for the continuous motion of human beings in some direction that doesn't get confined permanently blocked as it has so many times before in various periods in the history of man.

Mystery is gone to the certainty of technological principles. So the real terror the real aggression against life comes in the form of the pursuit of our technological happiness.

Pleasure only starts once the worm has got into the fruit to become delightful happiness must be tainted with poison.

No great deed is done by falterers who ask for certainty.