Alexander Pope,
The Guardian
(1806)
“ The adder intreated the traveller's assistance, who tying a bag to the end of his staff reached it, and drew him out: he then bid him go where he pleased, but never be more hurtful to men, since he owed his life to a man's compassion. The adder, however, prepared to sting him, and when he expostulated how unjust it was to retaliate good with evil, 'I shall do no more,' said the adder, 'than what you men practise every day, whose custom it is to requite benefits with ingratitude. ”
