“Next it was found that it was physiologically and structurally the same in the plant, that it was the living part of the plant, that which manifested the life and did the work in vegetable as well as in animal organisms.”
Other Asa Gray Quotes
It was implicitly supposed that every living thing was distinctively plant or animal; that there were real and profound differences between the two, if only they could be seized.
Asa Gray 
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But it was soon ascertained that this quaternary matter of the animal body was chemically the same in the plant, was elaborated there, and only appropriated by the animal.
Asa Gray
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I know some people who never have any difficulties to speak of. The moment I understood your premisses, I felt sure you had a real foundation to hold on.
Asa Gray
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