Descent of an Oath

I was born on a Thursday, so I recently made an oath to run 27 miles every Thursday, starting any time after midnight.
 
After running thirty-four miles in the 47-mile run, my oath descended to 13 miles. Soon it may descend to 10 miles.
 
-27 August 1982 
  
 
 
[Source: "Descent of an Oath" in Sri Chinmoy,  Run and Become, Become and Run, Part 11, Agni Press/Aum Publications, Jamaica, New York, 1983.]