An old Irish ballad going back to around the 1600's. It's been done near to death by everyone, up to and including Metallica, but this is still my favorite version of it:
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“Trouble rather the tiger in his lair than the sage among his books. For to you kingdoms and their armies are things mighty and enduring, but to him they are but toys of the moment, to be overturned with the flick of a finger.”
― Gordon R. Dickson, Tactics of Mistake
― Gordon R. Dickson, Tactics of Mistake