This design for computer system administrators shows the text "I think therefore I am root" in narrow white typefaces for good contrast with dark colors. It is a parody on the famous proposition "Cogito ergo sum" (I think, therefore I am) by the French philosopher, mathematician, and scientist Rene Descartes.
In a typical IT company setting only very few people have root permissions for the company computers. You need some profound technical knowledge and have your brain turned on 100% of the time to be in such a responsible position. You have to think. Show that you are that person and deserve to be root!