"Old age comes on suddenly, and not gradually as is thought." Emily Dickinson
Brain Pickings points to an appreciation of Italo Calvino contatining this gem of a thought.
“Asserting oneself … doesn’t mean asserting a name and a person. It means asserting oneself with all that one has inside, and what he has inside, underneath that pigeon chest, is taking on more and more precise contours.”
For me, at least, it's clearly time to read some more Calvino.