Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe.

The crux… is that the vast majority of the mass of the universe seems to be missing.

There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable.
There is another theory which states that this has already happened.

If the whole universe has no meaning, we should never have found out that it has no meaning: just as, if there were no light in the universe and therefore no creatures with eyes, we should never know it was dark. Dark would be without meaning.

Its taken 14 billion years for matter to gain the capacity to become conscious of itself. If this is true, it wouldn't make any sense that the whole point of enlightenment would be to escape from the whole process at the very instant that the universe is beginning to awaken to itself.

Consciousness... is the phenomenon whereby the universe's very existence is made known.

Be clearly aware of the stars and infinity on high. Then life seems almost enchanted after all.

The universe forces those who live in it to understand it. Those creatures who find everyday experience a muddled jumble of events with no predictability, no regularity, are in grave peril. The universe belongs to those who, at least to some degree, have figured it out.

If we do discover a complete theory, it should be in time understandable in broad principle by everyone ... Then we shall all, philosophers, scientists and just ordinary people, be able to take part in the discussion of why it is that we and the universe exist. If we find the answer to that, it would be the ultimate triumph of human reason—for then we would know the mind of God.

It is even harder to realize that this present universe has evolved from an unspeakably unfamiliar early condition, and faces a future extinction of endless cold or intolerable heat. The more the universe seems comprehensible, the more it seems pointless.

Deep in the human unconscious is a pervasive need for a logical universe that makes sense. But the real universe is always one step beyond logic.

The universe is like a safe to which there is a combination. But the combination is locked up in the safe.

In this interconnected universe, every improvement we make in our private world improves the world at large for everyone. We all float on the collective level of consciousness of mankind, so that any increment we add comes back to us. We all add to our common buoyancy by our efforts to benefit life. It is a scientific fact that what is good for you is good for me.

I don't pretend to understand the Universe - it's a great deal bigger than I am.

What makes the universe so hard to comprehend is that there's nothing to compare it with.

The idea of an indivisible, ultimate atom is inconceivable by the lay mind. If we can conceive of an idea of the atom at all, we can conceive it as capable of being cut in half; indeed, we cannot conceive it at all unless we so conceive it. The only true atom, the only thing which we cannot subdivide and cut in half, is the universe. We cannot cut a bit off the universe and put it somewhere else. Therefore the universe is a true atom and, indeed, is the smallest piece of indivisible matter which our minds can conceive; and they cannot conceive it any more than they can the indivisible, ultimate atom.

The reason why the universe is eternal is that it does not live for itself; it gives life to others as it transforms.

The greatness of the human being consists in this: that it is capable of the universe.

All of my life, I have been fascinated by the big questions that face us, and have tried to find scientific answers to them. If, like me, you have looked at the stars, and tried to make sense of what you see, you too have started to wonder what makes the universe exist.

The size of the universe depresses many people, but not me, I'm delighted at it.

Our sun is one of 100 billion stars in our galaxy. Our galaxy is one of billions of galaxies populating the universe. It would be the height of presumption to think that we are the only living things in that enormous immensity.