When it comes down to it, lots of people, not even church attenders necessarily, do believe Jesus is the one true light of the world, along with those he appoints to be lights to the gentiles, and they therefore do trust his teachings which have gained widespread or universal traction, such as “do unto others...”, “good samaritan”, “pearls before swine”, “practising what you preach”, and so on. To all these he will give the truth. That is why he is the light of the world. And they know he is the Son of God, no matter what theologies say. They learn to keep geeky, nerdish theological positions at a distance and get on with living out the truth. They do not lie to each other. They do not hate each other. They share the burdens. They look for a heavenly ending.
