Well his first point is simply to delineate philosophy from science. What Hawking is doing in the first three chapters of the book is philosophy. The way I understand what he is saying is that science does not give a total explanation of reality. From the get-go with Galileo and Descates, you had a move to mathematize of all physical reality. This move of Galileo was inspired by the philosopher Pythagoras who believed that mathematics was the underlying reality behind the material universe. Aristotle had the 10 causes to describe every physical thing. These were:
- Substance
- Quantity
- Quality
- Relation
- Place
- Time
- Position
- State or habitus
- Action
- Affection
As you can see, when you use the scientific method to make predictions, you primarily do this though measurable observations and focus exclusively on category 2- quantity. This is not a bad thing in itself, but it is a constriction of reality as we humanly know it. If you have read chapter 3 of Hawking’s book, you will notice that he tried to reduce all the hard and soft sciences to physics, going from physics to chemistry, to biology, and finally to psychology, but the higher up the chain of sciences you get, the less quantitative methods are effective, the more you have to take into account other categories of reality. In short, there is a whole slew of things being discussed in Hawking’s book that are simply outside of the scope of physics.
I think this is a valid point to make before looking at what Hawking is doing to try to prove that the universe does not need God to create it. Most of the (good) proofs for the existence of God are not scientific. They are philosophical. They rest on intellectual reasoning that look at reality as a whole, not just the limited focus of physics (math).
So that is a commentary on his first point. I’ll check out his next point later. Let me know if this is helpful.
(If you are looking for a discussion based on physics alone about the existence of God, then you have to understand that all such attempts fundamentally point to probabilities. Given X, Y, or Z, it is fundamentally unlikely that the universe began by chance. If that is what you are looking for, then this book by Father Robert Spitzer may be pretty good.
amazon.com/New-Proofs-Existence-God-Contributions/dp/0802863833/ref=la_B001K7TYHC_1_1/177-5597049-2118763?s=books&ie=UTF8&qid=1402172044&sr=1-1 He also has some clips on his web site that describes some of the theories in his book
magisreasonfaith.org/science_creation.html ).
God bless,
Ut