A Brief History of Time (Stephen Hawking)

Quotes from A Brief History of Time by Stephen Hawking:

The universe doesn't allow perfection.
If time travel is possible, where are the tourists from the future?
Ever since the dawn of civilization, people have not been content to see events as unconnected and inexplicable. They have craved an understanding of the underlying order in the world. Today we still yearn to know why we are here and where we came from. Humanity's deepest desire for knowledge is justification enough for our continuing quest. And our goal is nothing less than a complete description of the universe we live in.
If there really is a complete unified theory that governs everything, it presumably also determines your actions. But it does so in a way that is impossible to calculate for an organism that is as complicated as a human being. The reason we say that humans have free will is because we can't predict what they will do.
Only time(whatever that may be) will tell.
The increase of disorder or entropy is what distinguishes the past from the future, giving a direction to time.
God abhors a naked singularity.
In the eighteenth century, philosophers considered the whole of human knowledge, including science, to be their field and discussed questions such as: Did the universe have a beginning? However, in the nineteenth and twentieth centuries, science became too technical and mathematical for the philosophers, or anyone else except a few specialists. Philosophers reduced the scope of their inquiries so much that Wittgenstein, the most famous philosopher of this century, said, "The sole remaining task for philosophy is the analysis of language." What a comedown from the great tradition of philosophy from Aristotle to Kant!
The rate of progress is so rapid that what one learns at school or university is always a bit out of date. Only a few people can keep up with the rapidly advancing frontier of knowledge, and they have to devote their whole time to it and specialize in a small area. The rest of the population has little idea of the advances that are being made or the excitement they are generating.
As we shall see, the concept of time has no meaning before the beginning of the universe.
When a book was published entitled 100 Authors Against Einstein, he retorted, “If I were wrong, then one would have been enough!
In an infinite universe, every point can be regarded as the center, because every point has an infinite number of stars on each side of it