You are blessed and have been given a chance to take care of your Gramps. Use it wisely. Talk to them as much as you can, they have been around for 180 years together, sponge that wealth of information and keep it for the next generations (your kids or others). Asked them what their life was like in their teens and 20's, that world doesn't exist anymore and you can preserve it and learn from it. Your purpose might be to take care of them and make them transition and they will know that their lives mattered, they have seen a lot and know what to do and what NOT to do. Make notes or recordings or whatever. It's right in front of you, that is now your job. You do have a purpose! Don't waste it. That's the way I see it. Hope you can see it too....