"The cow-pox is a mild disease, and never fatal; the small-pox is a formidable one, and often fatal. The cow-pox is not infectious; the small-pox is highly so."

"I've dispatc'd, my dear madam, this scrap of a letter, To say that Miss — — is very much better. A Regular Doctor no longer she lacks, And therefore I've sent her a couple of Quacks."

"The disease has hitherto been confined to particular districts; and it has been observed, that where the Cow Pox has prevailed, the Small Pox has been much less frequent, and much less fatal."

"The most difficult task is often the most rewarding."

"I have never been a lover of controversy; but when truth is concerned, I am not afraid to speak out."