Le Morte d’Arthur
There was a knight of Arthur’s band
Who did great deeds by strength of hand
But no wise would he be content
Till Guinevere lay in his tent.
Disloyalty was his downfall
Without which he had had else all
“If only I had Guinevere”
Quoth he, “There’s nought else I hold dear.”
But all men know how that turned out
In Caxton’s book of Arthur’s Morte.
If Lancelot had not been false
Then things had not come to this pass.
But even in the courts of kings
Man’s fatal defect evil brings
And that’s why we can’t have nice things.
This story also appears in Crap Mariner’s 100 Word Weekly Challenge.