They were meant to be seen from the inside.
When waiting in line to thank the minister for the sermon or to ask a prayer for healing in the chapel during one of our remaining days this Advent season, look upwards at the stained glass. Illuminated by the sun, scenes from the Bible, history, nature (even a real moon rock) greet the attentive visitor. The stained glass surrounds us with stories, images and words from the Good News. Unlike the lay worshippers of the European medieval era, we, having the precious gift of literacy, can find deeper appreciation in the window art of the Cathedral.
Go outside, and the tall windows around the sides of the building are dark and unrevealing. It is by stepping indoors into the sacred space, the stained glass lovingly made by talented craftspersons come into their full potential; you may be fortunate to see a prism of colorful sunbeams.
In Him was life, and the life was the light of all people. The light shines in the darkness, and the darkness did not overcome it. [John 1:4-5]