A Quote by Carl Sagan

Valid criticism does you a favor. — © Carl Sagan
Valid criticism does you a favor.
But the proclamation, as law, either is valid, or is not valid. If it is not valid, it needs no retraction. If it is valid, it can not be retracted, any more than the dead can be brought to life.
[N]o scientist likes to be criticized. ... But you don't reply to critics: "Wait a minute, wait a minute; this is a really good idea. I'm very fond of it. It's done you no harm. Please don't attack it." That's not the way it goes. The hard but just rule is that if the ideas don't work, you must throw them away. Don't waste any neurons on what doesn't work. Devote those neurons to new ideas that better explain the data. Valid criticism is doing you a favor.
It is peculiar to “ressentiment criticism” that it does not seriously desire that its demands be fulfilled. It does not want to cure the evil. The evil is merely the pretext for the criticism.
Consumption is the death of capital, and the only valid arguments in favor of consumption are arguments in favor of death itself.
Valid criticism is something that we are open for, and we take it in the spirit in which it is given and try to improve ourselves.
Criticism pretty much follows anything anyone ever does. So, anytime anyone ever writes a song, plays a show, or does whatever they do, there's going to be a certain amount of criticism because that's kind of what happens.
A favor tardily bestowed is no favor; for a favor quickly granted is a more agreeable favor.
I think most athletes want to be told when they make a mistake. They don't want to be coddled. They can deal with criticism, especially when it's valid.
I don't have a very high opinion, actually, of the world of criticism - or the practice of criticism. I think I admire art criticism, criticism of painting and sculpture, far more than I do that of say films and books, literary or film criticism. But I don't much like the practice. I think there are an awful lot of bad people in it.
The fact that we're all hyphenating our names suggests that we are afraid of being assimilated. I was talking on the BBC recently, and this woman introduced me as being "in favor of assimilation." I said, "I'm not in favor of assimilation." I am no more in favor of assimilation than I am in favor of the Pacific Ocean. Assimilation is not something to oppose or favor - it just happens.
There's this tendency to be like, 'Where's the negative stuff? How valid is the criticism?' But honestly, what people think of me is none of my business. If I live on the Internet looking for public approval, I'm going to be miserable.
Perhaps this is the most important thing for me to take back from beach-living: simply the memory that each cycle of the tide is valid; each cycle of the wave is valid; each cycle of a relationship is valid.
Long ago, I made up my mind that, when things were said involving only me, I would pay no attention to them, except when valid criticism was carried by which I could profit.
I don't think theory adds to criticism. (Methodology does, for better or worse.) Theory's function is to make criticism self-conscious, maybe even a little sheepish, about its ex cathedra pronouncements.
Evolution does not necessarily favor the longest-lived. It doesn't necessarily favor the biggest or the strongest or the fastest, and not even the smartest. Evolution favors those creatures best adapted to their environment. That is the sole test of survival and success.
... there is no valid teaching from which there does not emerge something learned and through which the learner does not become capable of recreating and remaking what has been taught.
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