Who said "One cannot undo the past, however much one might wish to."?

This quote is attributed to Stevens.

One cannot undo the past, however much one might wish to. - Stevens

"One cannot undo the past, however much one might wish to."

Stevens

Character in The Remains of the Day

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"I can't even say I made my own mistakes. Really—one has to ask oneself—what dignity is there in that?"

"What is pertinent is the calmness of that beauty, its sense of restraint."

"I have walked this corridor any number of times and yet I was unable to recall the dimensions of the portraits."

"One cannot be a butler if one is to be haunted and unbalanced by memories of the dead."