Yes, it sounds absurd, but glass defines us. How? 

This material with a mysterious and unique identity has always fascinated human beings. Its development and use has modified our own evolution in ways we can’t even imagine.

The Middle Ages are often considered a period of little relevance to the development of glass, but what is not considered is how its philosophical value has changed through the marvelous and majestic Gothic cathedrals. The stained glass windows with their sparkling colors became a physical medium that acted as a link between God, the light that passed through them and the faithful. Thanks to the importance that this metaphysical essence had, numerous studies were carried out on it and glass, the material par excellence carrier of light, assumed considerable importance. 

But it is the windows in buildings, these simple lenses on the world, that have led to many changes: not only thanks to them we have the possibility to work for many more hours, but we can also speak of a change that takes place at a deeper level. Windows, mirrors, or lenses tend to concentrate and delimit thought, constraining vision and encouraging attention to the details of “what’s outside” of nature, thus creating a feeling of curiosity. 

It is difficult to attest to what amount and depth this happens, but it can be assumed that windows altered the relationships between human beings, the world around them, and beyond. Attention shifted to the eye, thus giving greater weight to the individual and leading to the growth of self-confidence, fundamental characteristics of the great Renaissance.