Dreams involving diapers and being cared for can symbolize feelings of vulnerability or a desire for comfort and support. In your dream, your wife putting you in pull-ups might indicate a need for nurturing or a return to a more innocent state, suggesting you might be feeling overwhelmed or in need of help in your waking life.

The library setting often represents knowledge, learning, and the search for information. The librarian's repeated warnings about not touching the books could signify a fear of making mistakes or overstepping boundaries. This might reflect anxiety regarding your job or a situation in your life where you feel you are not meeting expectations.

The librarian suggesting you quit your job could point to feelings of dissatisfaction or the need for change in your professional life. It might be worth considering if there are aspects of your job that you find overwhelming or if you’ve been contemplating a change.

Overall, this dream seems to reflect your current emotional state and possibly some conflicts or concerns in your life. It may be beneficial to take some time to reflect on any pressures you are feeling and consider if there are areas where you need to seek support or make changes.