Bully? You mean like in a physical way or more by way of harassment?
In school, I had three potential bullies. The first hit me in the face and I laughed at him. The second I threw down a set of bleachers in the gym. The third wound up getting hurt rather badly. Right or wrong, I was of the mindset that if I caused them enough trouble they wouldn't bother with me anymore, and it worked.
I think bullies in work (or church) are more people seeking to establish their place of dominance for whatever reason. It's important to establish boundaries to let them know exactly where that line is they shouldn't cross. For example, my manager hired a new contractor in December to help me with my workload. On about her second day there, she started criticizing everything we did as wrong, and how screwed up our processes were and how much work she'll have to do to correct it, blah blah blah.
When she finished whining, I ever so politely explained to her that the processes were not created for her, the world did not start revolving around the sun the day she started working there, and her job was to 'assist' me, not run the place. And I said it in such a way the she knew I was willing to put all this behind me but if it happened again I would rip the throat out of her neck. She been a great help ever since.
As for the 'turning the other cheek' part, I'm still working on that.