Text this: An information-theoretic equality implying the Jarzynski relation

  _____    _    _    _    _    __   __   _    _   
 |__  //  | || | || | || | ||  \ \\/ // | || | || 
   / //   | || | || | || | ||   \ ` //  | || | || 
  / //__  | \\_/ || | \\_/ ||    | ||   | \\_/ || 
 /_____||  \____//   \____//     |_||    \____//  
 `-----`    `---`     `---`      `-`'     `---`