Dr. Craig Bowron, writing for the Washington Post, discussed modern views of death and medical care in an excellent opinion piece, which you can read by clicking here.
We love our families; we want the best for them, and we want to do everything we can for them. Often, we cart our elderly loved ones from physician to physician, for "more tests, more medications, more procedures"; we do anything to give them - and us - a little more time. But sometimes, the best possible thing we can do is realize it is time to let go. This isn't easy; if anything, changes in our society have made this more difficult.
Choosing to accept that a loved one is nearing the end of their life is not choosing to lose hope. This choice (and choosing hospice care) actually allows you to make sure they receive the best care for their situation - care that focuses on physical and emotional comfort.