"It is a great satisfaction to me to reflect, that I have been instrumental in saving so many lives."

"The human mind is capable of great things; but it is also capable of great errors."

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

"The cow-pox protects the human constitution from the infection of smallpox."

"The most beautiful part of the human frame is the eye; and yet it is the most liable to disease."