I've been in education for many years, and I obviously kept going even when my stutter was punching my face a lot. I'm not sure that counts as "doing it", though - I mean, it's not like I willed the stutter away, or willed it not affecting me, I just endured the various punches (as it were). I can imagine people worse off than me being punched even more, and I think this is hard no matter the positive attitude. Some people never overcome it, but it's good for you that you manage! :)