Oh no. It's this question again. Nerva asked him once, and had to ultimately drop it because he just had no answer.
"...patrolling," he says lamely, the same thing Nerva said wasn't a hobby. "...and I... like to read, sometimes." Full stop. That's it.
"Any purpose I need, the Chantry gives me," he adds, hoping that's an acceptable answer. Sometimes he actually envies the Tranquil. ...more than sometimes.