If we’re going to talk about a Christian worldview and how to interact in the public square, it might be good to begin by defining terms.
I am going to start with worldview because it is the most general. Everyone has a worldview whether they know it or not, and every decision that each person makes is governed by that worldview.
It is almost like putting on a pair of sunglasses. It colors our understanding of the world around us. If my lenses are amber tinted, then certainly I am going to see differently than someone who is wearing rose tinted glasses. As a Christian, I view the world differently than my atheist friends. We put our faith in different assumptions about the nature of reality and therefore view the world differently.
Some might object to this illustration and claim to not have any faith; they objectively follow the evidence. Another illustration might help. If I see a red car drive by, presumably you and I would both agree that the car is red. That would seem to be an objective fact, but we are making the assumption that our eyes are reliable. We are assuming that the car does not arbitrarily change from blue to red every five seconds; we are assuming that a red car is constantly red because it has been painted that color.
These underlying assumptions that even seem incredibly mundane are parts of our worldview.
We live on a remarkable planet; it is hard to deny that. Gravity operates in certain ways on our planet, and because of our faith in the reliability of the scientific method, our perception of an object falling is influenced by our understanding of the theory of gravity. We believe it is going to keep falling because in our experience, that is simply what falling objects do consistently. Because of our “gravity-tinted” sunglasses, we view the world in such a way that gravity is going to operate as it always has.
Each person has a worldview. We all experience the world around us, and we have a network of beliefs that we put our faith in and frame how we interpret the evidence that is coming in through our senses.