What question could I ask here that would lead to the greatest change?

How often can you see everything in someone else's universe? You know exactly what they could do different, that if they chose it would create change beyond their imagination?

How many times have you tried to tell, show, coax, persuade, debate, argue, or fight to share your awareness, trying to help them see it, and then choose it? How often has that worked? Always, sometimes, or almost never?

If you'd like an easier approach with more dynamic results, ask yourself "What question could I ask here that would lead to the awareness that will create the greatest change?"

Then putting aside your hopes and dreams about the change you know is possible, ask the question that comes to mind. It might appear to have nothing to do with the 'issue'. It might be as seemingly unrelated as "Are you looking to change something? If so, just ask and I'll do what I can to help." 

Then smile and wait until they ask you. Are you willing to wait?