What symbolic meaning is conveyed through the stained glass in Gothic cathedrals and Byzantine art's opulent use of gold leaf and mosaic decoration?

In Gothic cathedrals, stained glass symbolizes divine light and knowledge, transforming sunlight into colorful narratives that convey biblical stories and moral lessons to the faithful. Similarly, Byzantine art's use of gold leaf and mosaic decoration reflects the heavenly realm, signifying the divine presence and the eternal nature of the sacred. Together, these artistic elements serve to elevate the spiritual experience, guiding worshippers towards a deeper understanding of faith and the divine.