“When we gaze at a star in the Milky Way which is 50,000 light-years away from our sun, we are looking back 50,000 years in time.""The idea is much too big for my little head.""The only way we can look out into space, then, is to look back in time. We can never know what the universe is like now. We only know what it was like then. When we look up at a star that is thousands of light-years away, we are really traveling thousands of years back in the history of space.”

“We don't knoe when we're going to make our exits. But one day we'll pass away from this carnival with all its masks and roles, and only a few transient props will remain after us, until they too are swept away. We will step outside time, leave what we call 'reality'.”

“We can be hindered in our development and our personal growth by political conditions. Outer circumstances can constrain us. Only when we are free to develop our innate abilities can we live as free beings. But we are just as much determined by inner potential and outer opportunities as the Stone Age boy on the Rhine, the lion in Africa, or the apple tree in the garden.”

“Hume emphasized that the expectation of one thing following another does not lie in the things themselves, but in our mind. And expectation, as we have seen, is associated with habit. Going back to the child again, it would not have stared in amazement if when one billiard ball struck the other, both had remained perfectly motionless. When we speak of the 'laws of nature' or of 'cause and effect,' we are actually speaking of what we expect, rather than what is 'reasonable.' The laws of nature are neither reasonable nor unreasonable, they simply are. The expectation that the white billiard ball will move when it is struck by the black billiard ball is therefore not innate. We are not born with a set of expectations as to what the world is like or how things in the world behave. The world is like it is, and it's something we get to know”

“When we die, as when the scenes have been fixed on to celluloid and the scenery is pulled down and burnt — we are phantoms in the memories of our descendants. Then we are ghosts, my dear, then we are myths. But still we are together. We are the past together, we are a distant past. Beneath the dome of the mysterious stars, I still hear your voice.”

“The German poet Goethe once said that "he who cannot draw on three thousand years is living from hand to mouth." I don't want you to end up in such a sad state. I will do what I can to acquaint you with your historical roots. It is the only way to become a human being. It is the only way to become more than a naked ape. It is the only way to avoid floating in a vacuum.”

“Maybe we can comprehend a flower or an insect, but we can never comprehend ourselves. Even less can we expect to comprehend the universe.”