If someone steals your password, you can change it. But if someone steals your thumbprint, you can't get a new thumb. The failure modes are very different.
Misery won't touch you gentle. It always leaves its thumbprints on you; sometimes it leaves them for others to see, sometimes for nobody but you to know of.
I have you and even if we never meet or ever see each other, we have left our thumbprints in the thick, moist clay of each other's lives.
I specialize in what the French call la petite histoire. I am interested in the individual thumbprint.