Edward Jenner — "I have always been a lover of nature, and I have always found great pleasure in …"

"The most important discoveries have often been made by accident."

"Altho' I should be happy to shield it myself from the speckled Monster, yet I would advise you not long to risk my coming to Town. I will just add that I consider the Vaccine Lancet in the hand of [Dr…"

"The Cow Pox, when it has once taken place, is a security against the Small Pox for life."

"I have often reflected, with a degree of wonder, on the slow progress of human knowledge."

"I have often been surprised at the credulity of mankind; but I have also been surprised at their obstinacy."