I have often been surprised at the credulity of mankind; but I have also been surprised at their obstinacy.
Smallpox vaccine
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"I have always been a lover of nature, and I have always found great pleasure in studying her works."
Strange & Unusual"My mind is so completely absorbed in this subject, that I can think of nothing else."
Strange & Unusual"The most difficult task is often the most rewarding."
Strange & Unusual"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…"
Controversial"It is the lot of man to suffer; but it is also his lot to alleviate the sufferings of others."
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