Tender-handed stroke a nettle,
And it stings you for your pains;
Grasp it like a man of mettle,
And it soft as silk remains.
'T is the same with common natures:
Use 'em kindly, they rebel;
But be rough as nutmeg-graters,
And the rogues obey you well.
-- Aaron Hill (1685-1750)
-- Verses written on a window in Scotland