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"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."
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"We cannot measure time. We can only measure changes of life and the universe."

"I wouldn't ask too much of her,' I ventured. 'You can't change the past.''Can't change the past?' he cried incredulously. 'Why of course you can!"

"Wouldn't it be amazing if you could travel into the future, see where you messed up, and then go back in time to rearrange things in order to make your future better? You can. If you can foresee regret, you can mind-travel to the future. If you can train yourself to mind-travel effectively, you can intentionally affect your future by doing something about it today."

"A broad margin of leisure is as beautiful in a man's life as in a book. Haste makes waste, no less in life than in housekeeping. Keep the time, observe the hours of the universe, not of the cars."

"Eternity is a mere moment, just long enough for a joke."

"The value of time is immeasurable."

"Sometimes I feel like if you just watch things, just sit still and let the world exist in front of you - sometimes I swear that just for a second time freezes and the world pauses in its tilt. Just for a second. And if you somehow found a way to live in that second, then you would live forever."
Explore more quotes by Asa Gray

"I am sufficiently convinced already that the members of a profession know their own calling better than anyone else can know it."

"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."

"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."

"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."

"We have spoken of beings so low in the scale that the individuals throughout their whole existence are not sufficiently specialized to be distinctively plant or animal: yet these are definite life in simpler shape."

"The best opinion now is, that there are multitudinous forms which are not sufficiently differentiated to be distinctively either plant or animal, while, as respects ordinary plants and animals, the difficulty of laying down a definition has become far greater than ever before."

"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."

"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."

"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."

"I take it for granted that you do not wish to hear an echo from the pulpit nor from the theological class-room."
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