I think my heartbeat might be the Morse code for 'inappropriate.'
— Rives

Repetition is based on body rhythms, so we identify with the heartbeat, or with walking, or with breathing.
Karlheinz Stockhausen heartbeat quote

True love is night jasmine, a diamond in darkness, the heartbeat no cardiologist has ever heard. It is the most common of miracles, fashioned of fleecy clouds -- a handful of stars tossed into the night sky.
— Jim Bishop

I work between my heartbeat. I have one-and-a-half seconds to actually move. And at the same time I have to watch I don't inhale my own work.
— Willard Wigan on creating micro-sculpture

This heartbeat is louder than death. / Your war drum ain't louder than this breath.
— heartbeat quotation by Suheir Hammad