Originally Posted by Miravlix
... a good dark urge, even if he fails EVERY SINGLE dice roll to stop himself. Failing DOES NOT MAKE YOU EVIL!
Wrong. Failing does exactly represent you being evil or doing something evil. The checks are merely a mechanical abstraction. What they represent, pass or fail, is your character's actual thoughts/words/actions.

"Good Dark Urge" is the ultimate oxymoron in BG3. Good Dark Urge simply does not exist.