Clients and non-duality: listener question

Thank you for a brilliant 'How does it fit together' webinar. I really loved it. The question came up about what to say to introduce this conversation to a client who doesn't already have any knowledge of it, and your response was for the teacher/coach to go within to see where the issue that the client has come with is a reflection of them/their experience.  Can you please say more about this, and how this may inform the conversation.