the theme of hope pops up a lot in the game. Terra is the last hope of the Returners and later the world, the World of Ruin is completely about characters learning to regain hope that things can be changed and Kefka stopped. Terra finds hope in living with people and accepting her esper heritage through the next generation of people who are not tarnished by the stories of the past about her race. The reason I added meaning in one's life is because that's where the theme of love you see comes into play as each character finds their reason to continue on. Yes many of them are love, but there is also acceptance, friendship, duty, and most of all hope that spurrs the party to get off their ass and attempt to save the world again. Kefka's whole final speech against the party in the game's ending is about finding meaning to not give into nihilism like he has. That's where I'm coming from at least.