Achilles' Heel
An Achilles’ heel is a deadly weakness in spite of overall strength, that can actually or potentially lead to downfall. While the mythological origin refers to a physical vulnerability, idiomatic references to other attributes or qualities that can lead to downfall are common.
Famous quotes containing the word heel:
“Poor men have grown to be rich men,
And rich men grown to be poor again,
And I am running to Paradise;
And many a darling wit’s grown dull
That tossed a bare heel when at school,
Now it has filled an old sock full....”
—William Butler Yeats (1865–1939)