Given Any Thought to Your Philtrum?

I have encountered at least half a dozen references to the dent in your upper lip in an amazing book called "The World to Come" by 20-something author Dara Horn. Google tells me that the anatomical name for this little dent is "philtrum."

I recalled hearing a charming myth on the origin of the dent – from Google:

A story was told about how children come to earth. Before they come, God tells them they cannot speak of heaven for otherwise people will not stay on earth and do their work. Even
though the babies are not allowed to "tell," God says they will remember heaven always and long for it in their dreams. God puts a finger to the babies' lips to hush their speaking of heaven directly. And this special gentle touch is what in humans makes that tender indentation below the mentum of the nose.

References to the dent in Horn’s book range from a drop of blue paint landing on someone’s philtrum to the protagonist putting his index finger on his lover’s philtrum. The dent serves many purposes, but seems to fascinate the author.

I put my finger in the dent (and it fits just perfectly) and wonder just what I know about heaven. Is it all stored somewhere inside my being, just waiting to kick in at the right moment?

Now be honest, had you ever heard the word philtrum before reading this?