St Augustine and Gothic Architecture

One of St. Augustine's primary believes was that we should the holy beauty within by removing the faulty impressions of sensory knowledge to attain divine wisdom. Basically he thought that our bodies were a faulty dark cage and our souls were the light inside. The goal was to allow that light to travel to heaven. He thought that 'by looking inward (introspection) and then upward (for grace), on can achieve salvation and happiness.' The idea that inside their is light that will allow us to get closer to heaven. That believe soon got applied to the Gothic Architectural style that evolved at the time. The outsides of the churches were dark representing our bodies that are cages. But when you enter inside the church it is filled with light from the beautiful stained glass clerestory windows. People like Augustine can experience the heavens and God's power without these windows but the poor aren't saints and they could never  have a beatific vision. The stained glass serves that purpose. As gothic architecture became more and more ornate the windows got larger and larger. Representing God and Jesus coming it the church or cathedral. The stained glass windows allowed the heavenly light to reach those within who were seeking God.