Christianity affirms that God created all things ex nihilo, out of nothing, by His word. The scriptures describe a creation by divine fiat. Unlike the sexualized or violent creation myths of primitive nature religions, or the modern myth offered up by scientism which locates the origins of the universe in a sort of undirected spontaneous generation, the Christian faith posits instead an intelligent, deliberate, personal, and creative source behind time, space, matter, and life.
The created order itself suggests a first cause.
Likewise, the apparent irreducible complexity of certain basic structures necessary for life points toward an intelligent designer.
Faced with the brute fact of being, of existence, of something rather than nothing, and most especially of an ordered, comprehensible universe, it seems to me that the fundamental issue is just this: Can nothing produce something? More to the point: Did unconscious matter give birth to consciousness? Is non-life able to create life?
In short is it possible that primordial matter, mysteriously pre-existent, and by cosmic happenstance, gave rise to profound complexity, order, and life?
For the Christian, the Genesis creation narrative (Genesis 1-2) describes the origin of the universe, this world, and its creatures, including human beings. It offers an answer to the question: Why is there something rather than nothing? And, Why are we here?
The Genesis creation story would point us to a Creator separate from and prior to creation. That truth works itself out in the remainder of both Genesis and the balance of the scriptures.