Bang on, Karen! Whatever Trump might think he is doing when he listens to people, unconsciously he is searching for and only interested in plans with the greatest odds of fostering his own glorification. 

Anyone with his ear and an agenda to push, but coach their agenda in terms that suggest buying into that agenda is likely to foster Trump's own glory. 

So you have it exactly right, in terms of strategy.

As for content, if Francis decides to attempt to teach Trump whenever they do meet, I bet he will go for influencing him on climate change. If Trump ever comes to believe there is more glory for him in fighting climate change, his policy will pivot 180 degrees once again.