“If perfect health is the best preventive and security against disease, and if a well-selected and properly administered vegetable diet is best calculated to promote and preserve that perfect health, then this part of the subject — what I have ventured to call the medical argument — is at once disposed of. The superiority of the diet I recommend is established beyond the possibility of debate. Now, that this is the case — namely, that this diet is best calculated to promote perfect health — I have no doubt.”

C'est une ennuyeuse maladie que de conserver sa santé par un trop grand régime.
Maxim 72 of the Maximes supprimées.
Later Additions to the Maxims

George Dennison Prentice http://www.picturehistory.com/product/id/4820, in Prenticeana (1860)
Misattributed

Infertility Counseling: A Comprehensive Handbook for Clinicians - Page 179 by Linda Hammer Burns, Sharon N. Covington - Medical - 2000.
Collected Works

Interview, 1994; as quoted in Souls Like Ourselves by Andrea Wiebers and David Wiebers (Rochester, MN: Sojourn Press, 2000), p. 51.

1, 2, 1
On Abstinence from Killing Animals

They Will Inherit the Earth (2018)

Vol. 2, p. 531
Testimonies for the Church (1855 - 1868)

Letter (21 February 1952); published in Ernest Hemingway: Selected Letters 1917–1961 (1981) edited by Carlos Baker

Vol. I, ch. 9
Lady Holland's Memoir (1855)