"The opposition I have met with has only served to confirm me in my opinion."

"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 deviation of the Cow Pox from its true character appears to be very frequent; and when it does appear, it is, as far as I have seen, uniformly in the following manner: The vesicle, instead of bein…"

"The path of discovery is not a smooth one; it is often beset with difficulties and discouragements."

"The true philosopher is he who is always learning, and who is never ashamed to confess his ignorance."