"
A Universe From Nothing"
What I say is not a mistake, it's how I understand.
I meant it's a mistake to use a word that someone used in one sense or meaning as if they used it with a different sense or meaning; it's form of straw man or equivocation fallacy.
On reflection, I was over critical.
I've heard Krauss a lot talking about his book...He's desperate to figure out a way to explain how nothing means something different because NOW science has to deal with the universe coming into creation FROM nothing....Before science just said it always existed...so they have a bigger problem now.
Sort of, but not exactly. The objective is to explore how a universe with properties like our own could arise, in terms of the big bang, and in terms of some more fundamental state, using models based on general relativity and particularly quantum mechanics, i.e. assuming that the laws of quantum mechanics apply in any such state.
At a fundamental (particle) level in our spacetime, interactions are completely reversible, so there is no directional arrow of time and no causality; the arrow of time, and consequently causality, are emergent statistical properties of a very well-ordered state undergoing large numbers of interactions (the state at the big bang). The simple fact that there many more ways to be disordered than ordered means that the random reversible interactions will tend to disorder the initial state, causing an asymmetry with respect to time - a present , past, and future generated by increasing disorder. This increasing entropy (disorder) is where we get the laws of thermodynamics from, and what drives the development of the universe and the complexity it produces.
Two areas for investigation are why there was a highly ordered initial state. i.e. why was entropy so low at the big bang, and how the space & time of our universe emerge from a more fundamental state. There are numerous theoretical models for how universes like ours are 'born'; our best current description of how the big bang progressed to the universe we see today predicts that our universe is likely one of many universes produced by the same mechanism. This is the 'universe from nothing' concept - universes created by this mechanism, like ours, have zero overall energy - the mass and energy they contain are balanced by the tension (gravity) they generate in spacetime; like wave and trough, they sum to zero.
The idea of some fundamental state that has quantum instabilities from which spacetime itself emerges makes an ultimate temporal origin moot; ultimately, questions of existence, God or no God, must come down to brute fact. God ideas may be useful in human psychology and social organization but have no utility in physics.
And all this saving us stuff is nonsense.
What 'saving us' stuff?
Jesus is the Word of God...He spoke for God.
To teach us how to be here and now...and, if we're interested, how to be with God forever after death.
So one story goes. Other stories are available...
I don't think people that don't believe in God are dumb or ignorant...I do feel like they haven't accepted the Light.
Likewise, I'm sure
