This is truly the best thing you can do. Any influence can always be interpreted as control or manipulation..... or a "but YOU wanted me to do this" kind of thing... believe me, a confused spouse does not want anyone trying to tell him what to do or influence him. That only pushes them the other way.
Emotionally detach tell him you want him to do what's going to make him happy. Allow whatever he does to be his decision entirely (let him carry that weight!). And you work towards creating a great life for yourself with or without him.
There is no arriving, ever. It is all a continual becoming.