The torments of martyrdom are probably most keenly felt by the bystanders.
— Ralph Waldo Emerson

A joke, even if it be a lame one, is nowhere so keenly relished or quickly applauded as in a murder trial.
Mark Twain keenness quote

There is nothing to winning, really. That is, if you happen to be blessed with a keen eye, an agile mind, and no scruples whatsoever.
— Alfred Hitchcock

They were keen for me still to play the piano, which I was going to, but 45 minutes of piano would be extremely boring. I like a bit of light and shade.
— Keith Emerson

Joy in the universe, and keen curiosity about it all -- that has been my religion.
— keenness quotation by John Burroughs