This video was just put out by the YouTube channel, drcraigvideos. It explains the basics of the KCA wonderfully, so I felt the need to transcribe it and post it here. The words are not mine, they are directly from the video. I take no personal credit for the information.
For more information on the youtube channel, drcraigvideos, click here.
For more information on ReasonableFaith (Dr. Craig’s website), click here.
Here it is:
“Does God exist, or is the material universe all that is or ever was or ever will be?
One approach to answering this question is the cosmological argument. It goes like this:
1. Whatever begins to exist has a cause.
2. The universe began to exist.
3. Therefore, the universe has a cause.
Is the first premise true?
Believing that something can pop into existence without a cause is more of a stretch than believing in magic. At least with magic you’ve got a hat and a magician.
And if something can come into being from nothing, then why don’t we see this happening all the time?
No, everyday experience and scientific evidence confirm our first premise. If something begins to exist, it must have a cause.
But what about our second premise?
Did the universe begin, or has it always existed?
Atheists have typically said that the universe has been here forever. “The universe is just there, and that’s all” (Bertrund Russell)
First lets consider the 2nd law of thermodynamics. It tells us the universe is slowly running out of usable energy; and that’s the point. If the universe had been here forever, it would have run out of usable energy by now. The 2nd law points us to a universe that has a definite beginning.
This is further confirmed by a series of remarkable scientific discoveries.
– In 1915, Albert Einstein presented his general theory of relativity. This allowed us, for the first time, to talk meaningfully about the past history of the universe.
– Next, Alexander Friedmann and George Lemaitre, each working with Einstein’s equations, predicted that the universe is expanding.
– Then, in 1929, Edwin Hubble measured the red shift in light from distant galaxies.
This empirical evidence confirmed not only that the universe is expanding, but that it sprang into being from a single point in the finite past. It was a monumental discovery, almost beyond comprehension.
However, not everyone is fond of a finite universe, so it wasn’t long before alternative models popped into existence. But one by one, the models failed to stand the test of time.
More recently, three leading cosmologists, Arvind Borde, Alan Guth, and Alexander Vilenkin proved that any universe that has on average been expanding throughout it’s history, cannot be eternal in the past, but must have an absolute beginning.
This even applies to the multiverse, if there is such a thing.
This means that scientists can no longer hide behind a past eternal universe. There is no escape, they have to face the problem of a cosmic beginning. Any adequate model must have a beginning, just like the standard model.
It is quite plausible then, that both premises of the argument are true. This means that the conclusion is also true.
The universe has a cause.
And since the universe cannot cause itself, its cause must be beyond the spacetime universe. It must be spaceless, timeless, immaterial, uncaused and unimaginably powerful.
The cosmological argument shows that, in fact, it is quite reasonable to believe that God does exist.”