Everyone loves God.
Not everyone believes in God, but everyone loves God.
Sure, there may be a handful of souls on earth so dark and twisted that they recoil in the face of goodness and light. But for the vast majority of us, we imagine horizons of goodness, love, and beauty. And as our imaginations reach for the light our hearts ache at the beauty of that vision.
True, we might convince ourselves that the light isn't real, that what our hearts long for is imaginary. We could be like those prisoners described by Plato in his Allegory of the Cave, chained up in a dark cavern of skepticism, unwilling to believe in the rumors of sunlight. (For isn't that what the gospel is, a rumor of sunlight?) We may choose to live with shadows.
So, we might not believe in God. But everyone loves God. No one can behold that beautiful vision and not love and long for it.
You might not believe in the sun.
The sun shines nonetheless.
And the rumor of sunlight stirs the darkened, shadowed heart.