FF7 has themes of life because the Lifestream, and life is important because of Shinra's scuking of life, when someone dies, they are reborn, it mentions many times that FFVII's world is revolved around life. Many people had harsh times, but this helps them LIVE. Life also is also put into play when the world nearly ended, the Lifestream stops Meteor. It shows that the world can live, and that life is so valuable, people take it for granted.