“Regret is an inevitable consequence of life.”
Cigarette Smoking Man, The X Files, Season 2 episode 25 “Anasazi” first airing on the 19th May 1995 written by Chris Carter.
Context Note: The Cigarette Smoking Man says this to Mulder’s father after he remarks that the files they are talking about should have been destroyed. The interpretation could be “get over it.”
It is possible to interpret any statement in a number of ways, so I invite contrary analysis