Is it a rational position to believe that there is an all-powerful God who created the world and gives us purpose? This question has become the topic of many debates over the years. One of the reasons is because its answer has eternal significance. “The existence of a personal, moral God is fundamental to all that Christians believe.” Without a foundation in God, Christianity would crumble to the ground. Without God, man would just be an accident; a result of matter coming together and changing over time. This would create random accidental beings, and there would be no meaning, value or purpose. However, with God, we have meaning, value, purpose, and answers to many questions. But is this a rational position?
Rather than looking at personal likes and dislikes, we need objective arguments based in logic to help us understand if belief in God is rational. To just say, “I feel” or “I think” is not enough. There have been four basic arguments that have been used over the years to prove God’s existence, three of which will be covered here. These are arguments from creation (cosmological), design (teleological), and moral law (axiological). With these arguments we should be able to give a logical and objective approach to see if God’s existence is rational.
1. The Argument Based On Creation
The first argument comes from creation and is called the Kalam Cosmological Argument. It states that whatever begins to exist has a cause. The universe began to exist; therefore, the universe has a cause. The first premise shows to be true because it is clear that whatever begins to exist has a cause. We don’t see things coming into existence every day. Are you able to give an example of anything that came into existence from nothing and without a cause? The second premise stating that the universe had a beginning is supported by philosophy and science. Science and philosophy give us strong evidence that the universe cannot be eternal and has to have a starting point. One scientific example is the 2nd law of thermodynamics. It states that the universe is running out of usable energy. “If the universe is running out of energy, and it has been here infinitely long, it would have run out of its energy infinitely long ago.” Based on the first two premises, the conclusion follows that the universe has a cause. Whatever this first cause was had to be spaceless, timeless, uncaused, all powerful and immaterial. That sounds a lot like God.
2. The Argument Based On Design
The cosmological argument open the door for a rational belief in God, and when added, the second argument strengthens our case for a rational belief in God. The second argument is based on design and is the teleological argument. The design argument deals with the presence of order in the universe. This order can be explained by either scientific laws or personal explanations. Scientific laws explain things like the law of gravity or the laws of motion. Personal explanations describe things like ability, intention, or order. For example, there is no scientific law explaining why your phone is lying next to your computer. It is only the person who put the phone there that can explain why he/she did that.
One thing that all of these scientific laws and personal explanations show us is that there is order in the universe. The universe has been so finely tuned that the slightest change would create a disaster. Science has discovered this delicate balance over the last 25-30 years. For example, if the mass of a proton changed in the slightest, there would be no possibility for life. These numbers are so finely tuned that there has to be an intelligent designer. In the same way that a building has an architect, a painting has a painter, a computer program has a programmer, and a code has an encoder, the universe has to have an intelligent designer to explain its order and intricacy.
One scientific finding that has caused problems for many atheists is the information stored in DNA. “Even atheist Richard Dawkins, in his book Blind Watchmaker, admits that the DNA information in a single-cell animal equals that in a thousand sets of an encyclopedia!” It is hard to believe that someone would stumble across a thousand sets of an encyclopedia and think that they just randomly appeared out of pure chance. One scientist figured that the odds for this type of a single-cell organism to form by chance are 1 in 10 to the 40,000th power, and it is infinitely more complex for a human being to emerge by chance. All of this shows that science does not disprove the existence of God but that the rational explanation is that there has to be an intelligent being that created and designed our highly ordered DNA.
3. The Argument Based On Moral Values
We have seen the need for a cause and an intelligent designer, so now let’s see if we need a moral law giver. The first thing to realize is that there really is right and wrong and everyone expects others to follow that moral code. These objective moral laws don’t show us what is, but what ought to be. Unless you are in a position of authority, you cannot tell someone they ought to do something. You could possibly say you think they should or you think it would be better, but this turns into subjective morality. In order for there to be objective moral values for all people at all times, we need someone in an objective position of authority. Even governments can’t be this authority because then each government would create its own morality and everything would return back to being subjective. The only way to explain objective moral laws is to have an objective moral law giver, God.
It is also interesting that in order to deny moral absolutes; you have to make an absolute denial. It is very hard and sometimes even impossible to hold to the point that there are no objective morals. As soon as someone does something you don’t like and you tell them that they shouldn’t do it, you are making a moral statement. You are claiming that there are objective morals and we ought to obey them. Any time someone claims there is evil in the world or that the world is unjust, they are affirming objective morality. So in fact, the attempt to deny the existence of God by using evil in the world actually confirms his existence. Without God there would be no right or wrong, just different decisions. It is easy to claim relativism and say there are no objective moral laws, but it is nearly impossible to live it. “A moral atheist is like someone sitting down to dinner who doesn’t believe in farmers, ranchers, fishermen, or cooks. She believes the food just appears, with no explanation and no sufficient cause.”
These three arguments combined show us the need we have for a cause, an intelligent designer, and a moral law giver. There is no possible way that our universe could begin to exist, be intricately designed, and have objective moral laws without God. These scientific and philosophical arguments make a very strong case that belief in God is a rational position. The odds of having what we have without God would be too large to count. Even if life could be possible, without God it would be meaningless. The best explanation for all of the evidence that we have is that there really is a God and therefore it is a rational position to believe that God exists.
 Norman Geisler, When Skeptics Ask (Grand Rapids: Baker Books, 2013) 9
 William Lane Craig. “The Absurdity of Life Without God.” Lecture
 J.P. Moreland, “Arguments for the existence of God.” Lecture
 J.P. Moreland, “Arguments for the Existence of God.” Lecture
 J.P. Moreland, “Arguments for the Existence of God.” Lecture
 Geisler 15
 Geisler 16
 Geisler 16
 Geisler 287
 Francis J. Beckwith and Gregory Koukl, Relativism (Grand Rapids: Baker Books, 1998) 168