“Oho!” said the pot to the kettle;
“You are dirty and ugly and black!
Sure no one would think you were metal,
Except when you’re given a crack”.

“Not so! not so!” kettle said to the pot;
“‘Tis your own dirty image you see;
For I am so clean – without blemish or blot – 
That your blackness is mirrored in me”.

Pot calling the kettle black