We can’t make somebody do you anything. We can try to persuade them or influence them. We can try to use logic and appeal to their emotions. Studies show that people respond most to fear, but there are always the outliers who will respond better to the idea of pleasure.
The bottom line is that it’s not up to us. We don’t have to make someone say something, do some thing, or believe something. The only thing we can focus on is giving advice if they want it, speaking our opinion when the time is right, and hoping that the outcomes turn out the best for that individual.