"The joy I felt at the prospect before me of being the instrument destined to take away from the world one of its greatest calamities was so excessive that I sometimes found myself in a kind of reverie…"

"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 have always endeavoured to be guided by reason, and not by prejudice."

"The discovery of vaccination is one of the most important that has ever been made."

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