Offer support and encouragement
Tell the person, "I support the changes you want to make in the way you think about this. I understand. I don't object to your having the discussions you need to have, and I'll support you." Then, offer support and encouragement. Be specific: "Will you call me next month?" or "I'll have a copy of an article [and other materials] just for you."
Finally, ask the person how the changes can affect him or her and offer to help in any way that may make sense to both of you.