"I have often thought that if mankind were more generally enlightened, they would be more virtuous."

"This Inquiry will lay all those troublesome ghosts which have so long haunted the Metropolis with their ox-faces, & dismal hootings against Vaccination. However, tis all for the best – you may depend …"

"I am not surprised that men are not grateful to me; but I wonder that they are not grateful to God for the good which He has made me the instrument of conveying to my fellow creatures."

"The deviation of man from the state in which he was originally placed by nature seems to have proved to him a prolific source of diseases."

"I shall not attempt to give a detail of all the cases that have come under my observation, but shall select a few of the most striking, and such as will, I trust, be sufficient to convince the candid …"