As a librarian, I found this 1947 vocational guidance film from Iowa State University fascinating. Paul of Weird Universe comments, "I don't believe the information sciences are much like this anymore." I disagree.
Oh, the technology has certainly changed! Programming, 3D printing, and manipulating learning management programs, among other technology skills, are common tasks for librarians today. But one thing definitely hasn't changed. At the beginning of this video, the narrator gets to the heart of librarianship:
Now, do you like people? And do people like you? Do you like all kinds of people? The young as well as the old? People in all stations of life? You do? That's wonderful.
Aside from a few specialized roles, librarianship is, above all, working with different people effectively. All of the principles outlined in this video made 67 years ago are still applicable.