I was reading through this question Can a Muggle do anything with a wand? and Valorum’s answer said this:
JKR addressed this point in an interview in 2006;
"I been asked what would happen if a Muggle picked up a magic wand in my world. And the answer would probably be something accidental... possibly quite violent. Because a wand, in my world, is merely a vehicle — a vessel for what lies inside the person."
So then, what if you’re someone who is completely good and has no "violence" inside of you, would you then be able to use a wand?