"For remember," he said, "that it is altogether your world no..." — Susan Cooper quote meaning

For remember," he said, "that it is altogether your world now. You and all the rest. We have delivered you from evil, but the evil that is inside men is at the last a matter for men to control. The responsibility and the hope and the promise are in your hands--your hands and the hands of the children of all men on this earth. The future cannot blame the present, just as the present cannot blame the past. The hope is always here, always alive, but only your fierce caring can fan it into a fire to warm the world.