If you light upon an impertinent talker, that sticks to you like a bur, to the disappointment of your important occasions, deal freely with him, break off the discourse, and pursue your business.
PlutarchDemosthenes, when taunted by Pytheas that all his arguments "smelled of the lamp," replied, "Yes, but your lamp and mine, my friend, do not witness the same labours.
Plutarch