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"It was always understood that plants and animals, though completely contrasted in their higher representatives, approached each other very closely in their lower and simpler forms. But they were believed not to blend."
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"I love them, they are so nice and selfish. Dogs are TOO good and unselfish. They make me feel uncomfortable. But cats are gloriously human."

"My parents were very permissive when it came to animals. As long as we earned the money to buy them and built whatever structure it was they were going to live in, we could have any kind of pet we wanted. They would have let us have a rhinoceros if we could have afforded it."

"Stage and film are just two wildly different animals. Why compare the two?"

"Animals, whom we have made our slaves, we do not like to consider our equal."

"I like animals because they are not consciously cruel and don't betray each other."
Explore more quotes by Asa Gray

"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."

"The former conviction that these two kingdoms were wholly different in structure, in function, and in kind of life, was not seriously disturbed by the difficulties which the naturalist encountered when he undertook to define them."

"I accept extinction as best explaining disjoined species. I see that the same cause must have reduced many species of great range to small, and that it may have reduced large genera to so small, and of families."

"I proceed with the proper subject of this discourse; namely, the further changes in scientific belief, which have occurred within my own recollection, even since the time when I first aspired to authorship, now forty- five years ago."

"We may take it to be the accepted idea that the Mosaic books were not handed down to us for our instruction in scientific knowledge, and that it is our duty to ground our scientific beliefs upon observation and inference, unmixed with considerations of a different order."

"Your candor is worth everything to your cause. It is refreshing to find a person with a new theory who frankly confesses that he finds difficulties, insurmountable, at least for the present."

"This substance, which is manifold in its forms and protean in its transformations, has, in its state of living matter, one physiological name which has become familiar, that of protoplasm."

"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."

"It remains to consider what attitude thoughtful men and Christian believers should take respecting them, and how they stand related to beliefs of another order."

"Is it philosophical, is it quite allowable, to assume without evidence from fossil plants that the family or any of the genera was once larger and wide spread? and occupied a continuous area?"
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