There is no DSM-5 in the Scriptures. It is according to your belief that your truth unravels. And Scripture can fill in the gaps. For example, one thing I can appreciate about stuttering is that it never gave in to my pride. I was always the favorite and even entitled to it growing up. And as soon as I started feeling grandiose emotions about myself, I'd stutter like hell to a cashier or whomever I may have felt superior to/better than at the time. And that struck me back down from the grandiosity. And I am more humble and receptive now, connecting with people from all walks of life. Still, it is impossible to say that this is the why of my stuttering as per the will of God. However, it's an important lesson.