It's possible you're thinking of a specific organization or institution in Norman, which may have its own motto. To help me find the motto you're looking for, could you provide more context?
For example:
* Are you thinking of the University of Oklahoma (OU) in Norman?
* Is there a specific organization or business you have in mind?
* Is there a particular historical period or event related to Norman that you're interested in?
Knowing more about what you're looking for will help me give you a more accurate answer.