Vader had but only because of Shmi. Her fierce devotion to her son, her protecting him in ask the ways she could, her allowing him to be a child, despite everything had given him a strong sense of self. It has been worn, battered, and nearly killed but when he'd been thrust into roles by others, he'd had that. Had his own inner most thoughts and places to go to figure it out. It had helped.

"It may. One never knows what one could find. Or what may be possible to call forth." Holocrons being something he is constantly looking out for.