Why God Exists
Most people believe there is a God, but why? Must we depend on the Bible for our proof? I believe in the Bible, but here are some extra-Biblical reasons to believe that God exists.

There are two compelling reasons to believe in God: 1) the origin of the universe and 2) the complex order of the universe.
Origin of the universe
Most scientists today subscribe to the “Big Bang” theory that the universe hasn’t eternally existed but had a beginning. Timothy Keller, in his book The Reason for God: Belief in an Age of Skepticism, quotes scientist Stephen Hawking, “Almost everyone now believes that the universe, and time itself, had a beginning at the Big Bang.”1 Keller also quotes scientist Francis Collins, who says, “When you look from the perspective of a scientist at the universe, it looks as if it knew we were coming.”2 If the universe came from somewhere, the best explanation would be God.
Complex order of the universe
Most scientists today also acknowledge that our universe possesses an order and very fine mathematical precision. This precision defies human comprehension and is fundamental to intelligent life. According to Francis Collins, “There are 15 constants – the gravitational constant, various constants about the strong and weak nuclear force, etc. – that have precise values. If any one of those constants was off by even one part in a million, or in some cases, by one part in a million million, the universe could not have actually come to the point where we see it. Matter would not have been able to coalesce, where there would have been no galaxy, stars, planets or people.”3 This is the “Fine-Tuning Argument,”–that the universe was prepared for human beings.
Lee Strobel, in The Case for a Creator: A Journalist Investigates Scientific Evidence That Points Toward God4, interviewed several high level scientists, such as Robin Collins, Guillermo Gonzales and Jay Wesley Richards. They made the following points about the incredible fine-tuning of earth for life and exploration:
- The earth’s atmosphere is unique, filtering out harmful ultraviolet radiation while working with the oceans to moderate climate by storing and redistributing solar energy.
- The size of the earth is just large enough that its gravity retains the atmosphere and just small enough that is does not trap too many harmful gases.
- The earth has a nearly circular orbit, which prevents ice ages from occurring when temperature shifts on the surface of the planet.
- The earth’s distance from the sun is ideal for life, right in a safe distance range of +/- 5%.
- The liquid iron surrounding earth’s core creates a dynamo that generates the planet’s magnetic field, shielding us from low-energy cosmic rays.
- The earth contains valuable ores deposited near the planet’s surface, close enojgh to mine for technological development.
- The sun is one of the 10% most massive stars in the galaxy and emits the right colors of light (with a balance of red and blue), varies its light output by only 1/10 of 1%, and prevents wild climate swings on earth. 5
- The moon is large compared to earth, something unique in the inner solar system. The moon stabilizes the tilt of the earth, preventing major temperature swings.
- The moon also increases earth’s tides (the moon contributing 60% and the sun contributing 40%), flushing nutrients from the continents to the oceans, which keeps them nutrient rich, and maintaining large-scale ocean circulation, which keeps the higher latitudes relatively mild. 6
- The earth is ideally positioned for galaxy exploration:
- The sun is 400 times larger than the moon but is also 400 times farther away, which is a perfect match to view a total solar eclipse. Eclipses can yield important scientific discoveries, helping to interpret the spectra of distant stars and confirming that gravity bends light, as predicted by Einstein’s general theory of relativity.
- The earth is in in an excellent position to detect the cosmic background radiation, confirming the Big Bang theory.
- The earth’s atmosphere is transparent and allows the science of astronomy and cosmology to flourish
Could this have happened by accident? Did such a finely tuned universe for intelligent life spring forth without cause? The best answer is no. The best cause is God.
To Read More
Timothy Keller, The Reason for God: Belief in an Age of Skepticism
(New York, Riverhead Books, 2008)
Lee Strobel, The Case for a Creator: A Journalist Investigates Scientific Evidence That Points Toward God
(Grand Rapids, Zondervan, 2004)
References
- Timothy Keller, The Reason for God: Belief in an Age of Skepticism (New York, Riverhead Books, 2008), 133.
- Ibid.
- Ibid, 134.
- Lee Strobel, The Case for a Creator: A Journalist Investigates Scientific Evidence That Points Toward God (Grand Rapids, Zondervan, 2004).
- Ibid, 177.
- Ibid, 179.