“Seize the day. Because, believe it or not, each and every one of us in this room is one day going to stop breathing, turn cold and die.”
John Keating character
Related quotes

“You better live every day like your last because one day you're going to be right.”
As quoted in Wisdom for the Soul of Black Folk (2007) by Larry Chang and Roderick Terry, p. 365

“Every day the bucket a-go a well, one day the bottom a-go drop out.”
I Shot The Sheriff, from the album Burnin (1973)
Song lyrics

2012, Yangon University Speech (November 2012)
Translation from: Albert Carao (1919-1917) http://illusioncity.net/albert-caraco/ at illusioncity.net by Snake June 17, 2012
Ma confession (1975)

“One day all of us will die but - and this is the important thing - we are not dead yet.”
Source: I Shall Wear Midnight

Source: Detective Story (2008), p. 66.
Context: "You mustn’t forget about your future, Enrique."
"I’m living for the present, Dad."
"Ah!" he waved that aside. "The present is just temporary."
‘ I boiled up. "I know," I burst out. ‘It only has to be accepted temporarily — temporarily, but every day afresh. And every day ever more. Temporarily. Until we have lived to the end of our temporary lives, and one fine day we temporarily die.