Your work here is done. The more you push him now, the more doubt will come to his mind. Let the knowledge sink in first. The best approach is to let him come to you rather than tell him what to do. The own free will makes people become more dedicated to whatever they do.
Past performance is the key to understand what will come next. It doesn't determine the future, but you can get a more clear understanding on what is going to happen. So tell him that and sit back till he comes to you. That is the best you can do.