Clocks and Heartbeats

“In this world, there are two times. There is mechanical time and there is body time."
"They do not keep clocks in their houses. Instead, they listen to their heartbeats. They feel the rhythms of their moods and desires."
"Then there are those who think their bodies don't exist. They live by mechanical time. They rise at seven o'clock in the morning. They eat their lunch at noon and their supper at six. They arrive at their appointments on time, precisely by the clock.”
― Alan Lightman, Einstein's Dreams