This display is a diptych with exchangeable inlays in four different scripts: textur, fraktur, italic and current.
It serves as a reminder, citing from Steve Jobs famous Stanford commencement speech in 2005: Stay hungry. Stay foolish. It can be seen on YouTube – it is at the very end, but I recommend watching the full video – it is worth it!
These are the single inlays:
Here is an animation with all the inlays: