"Life is worth living."
Duffy is suing the Senate and the government for more than $7.8 million.
He made the comments in a recent interview with Rolling Stone magazine.
Sen. John Wallace served for eight years.
He compared it to being like a "rookie" hockey player.
The senator is back at work.
The Crown says it no longer believes there is a reasonable prospect to convict.
The alleged crime took place on April 3.
Sen. Patrick Brazeau still faces charges.
Harb retired from the upper chamber in 2013.