1. information, explanation
2. lighting, illumination
3. enlightenment (and in the definitive form upplysningen it's also the Age of Enlightenment)
in this way - in Swedish - illumination and lighting is intrinsically linked with the mental act of enlightenment. or you could state it the other way round: the mental act of enlightenment is intrinsically linked with the physical phenomenon of light. this has been given the most basic and literal architectural form in Gunnar Asplund's Public Library in Stockholm.
let's take a short walk through the building to see just how:
this is the centre of the library, from here you can continue in several different ways depending on what you're looking for: you can make your way up the shelves running around the drum or you can go to the reading rooms and specialist collections in any of the four wings.
August Strindberg on the top floor misaligned compared to the stair but aligned with the doors on the floor below).
as you walk down those stairs you're constantly able to see out through the glazed entrance portal and upon reaching the bottom step you find that what was a dark and somewhat oppressive entrance hall is suddenly a bright exit hall with light bouncing off the shiny walls and even the ceiling.
continuing out through the revolving door you're back in the same spot where you started from, exactly the same but having been subjected to some both literal and figurative upplysning since last.
you could find this analogy a little cheesy and over-didactic (well, assuming this was actually how Asplund thought about the project, something I haven't got a clue about) but there is no way of denying that the way the different rooms change their appearance and mood depending on if you're entering or exiting the building is plain masterful.