It's from T.S Eliot's 'Four Quartets'
Garlic ans sapphire in the mud
Clot the bedded axle-tree.
The trilling wire in the blood
Sings below inveterate scars
Appeasing long forgotten wars.
The dance along the artery
The circulation of the lymph
Are figured in the drift of stars
Ascend to summer in the tree
We move above the moving tree
In the light upon the figured leaf
And hear upon the sodden floor
Below, the boarhound and the boar
Pursue their pattern as before
But reconciled among the stars.
As for the meaning..
In an interview Robson Green said the phrase "wire in the blood" was taken to mean a genetic kink, something impure and unusual in the blood, that leads to a kind of psychosis.
It has also been thought be a metaphor for the thrill of adrenaline surging through the bloodstream.