The post I replied to was headed
When I tweeted it I used this header:
Don't think about what you can't do - think about what you have done
Always think about what you have done - don't think about what you could have done, if there is something you can do - do it! Remember, it is only you that will feel guilty about what you haven't done. The person with dementia, the one you care for, will not. Nor, will they ultimately hold it against you. Love and security is what they need, that is what they will remember.