"The most pleasing part of my life has been spent in the pursuit of knowledge."

"It is a pity that the practice of inoculation has not been more generally adopted; for if it had, many lives might have been saved."

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

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

"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…"