Talking about the caracters of Jack and Rose: It is true when people say that " the devil is in the details".

Consider this: Jack is in the freezing north atlantic. He knows that he is going to freeze to death. The feeling of a thousand knives stabbing into him is claiming his life. And what does Jack think of? The detail...of their love. He thinks of something as simple as a poker game... which lead him to the greatest prize, the greatest love of his life...Rose! He places his physical situation on the backburner and is greatful for meeting her. And he tells her that if she goes on without him, that it will be the greatest honor for him. It would have been all worth it for him to die. And that my friends is true love!