A fly, Sir, may sting a stately horse and make him wince; but one is but an insect, and the other is a horse still.
Notes from Wikiquote
Referring to critics
When a man is tired of London, he is tired of life; for there is in London all that life can afford.
Quote text and notes from Wikiquote: Samuel Johnson (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.