In me lived a sin
So strange, of such a kind, that all of pure,
Noble, and knightly in me twined and clung
Round that one sin, until the wholesome flower
And poisonous grew together, each as each,
Not to be pluck'd asunder; and when thy knights
Sware, I sware with them only in the hope
That could I touch or see the Holy Grail
They might be pluck'd asunder.
Alfred, Lord Tennyson, "Idylls of the King"
The Holy Grail, 769-777