In the last few years of his life, my father dove deeply into a world of crossword puzzles, jumbles, and Scrabble. These were "mind exercises," he said, built to hold off the thing he feared most: forgetting.
Just a couple of months before he passed away, he called my mother desperately from his cell-phone. He'd pulled his car off to the side of the road, didn't quite know where he was, and couldn't remember the way home. That moment plunged him into a bout of depression and despair.