A second piece of evidence that we had a beginning is seen in the movement of galaxies. All galaxies are moving farther away relative to each other. Their movement has a very distinct pattern which causes the distance between the galaxies to get greater with every passing day.
If we had three galaxies located at positions A, B and C in a triangle, tomorrow they will be further apart. The triangle they form will be bigger. The day after tomorrow the triangle will be bigger yet. We live in an expanding universe that gets bigger and bigger and bigger with every passing day.
Now let’s suppose that we make time run backwards! If we are located at a certain distance today, then yesterday we were closer together. The day before that we were still closer. Ultimately where must all the galaxies have been? At a point! At a beginning!! At what scientists call a singularity!
There are many other evidences and demonstrations that can be used to show that there was a beginning - such as the second law of thermodynamics. The second law of thermodynamics states that in a closed system, things move towards a state of disorder. This means that the cosmos must have had a beginning because if it had always been here it would now be totaly disordered and freezing cold because heat death would have set in. Therefore thermodynamically, the universe had to have a beginning.
The fact that the universe is not only expanding but accelerating in that expansion rules out the possibility that we live in an oscillating universe that is eventually pulled back to a central point from which it expands all over again.
Not only can strong evidence be given to prove that we had a beginning as the Bible says, but we can also see a logical problem in maintaining that the cosmos was uncaused. If the universe had a beginning and that beginning was uncaused, then something would have had to come into existence out of nothing. From empty space with no force, no matter, no energy and no intelligence, matter would have to become existent. Even if this could happen by some strange new process unknown to science today, there is a logical problem.
In order for matter to come out of nothing, all of our scientific laws dealing with the conservation of matter-energy would have to be wrong, invalidating all of chemistry. All of our laws of conservation of angular momentum would have to be wrong, invalidating all of physics. All of our laws of conservation of electric charge would have to be wrong, invalidating all of electronics. In order to believe matter is uncaused, one has to discard known laws and principles of science. No reasonable person is going to do this simply to maintain a personal atheistic position.
The atheist’s assertion that matter is eternal is wrong. The atheist’s assertion that the universe is uncaused and self-existing is also wrong. The Bible’s assertion that there was a beginning which was caused is supported strongly by the available scientific evidence. The next question is “What was the cause?” Was the cause a personal God who created the cosmos and life with purpose and intelligence? Or was the cause total chance - with no purpose and no intelligence?