"There is overwhelming proof that Vegetarianism is possible; there is an utter absence of proof that it is in any way detrimental to perfect health. It is, therefore, at least worthy of more serious consideration than it has yet received; before it is ridiculed and condemned it should at least be tried."
January 1, 1970
https://en.wikiquote.org/wiki/A_Plea_for_Vegetarianism_and_Other_Essays