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1 " Skepticism is thus a resting-place for human reason, where it can reflect upon its dogmatic wanderings and make survey of the region in which it finds itself, so that for the future it may be able to choose its path with more certainty. But it is no dwelling-place for permanent settlement. Such can be obtained only through perfect certainty in our knowledge, alike of the objects themselves and of the limits within which all our knowledge of objects is enclosed. "
― Immanuel Kant , Critique of Pure Reason
2 " That all our knowledge begins with experience there can be no doubt. For how should the faculty of knowledge be called into activity, if not by objects which affect our senses and which, on the one hand, produce representations by themselves or on the other, rouse the activity of our understanding to compare, connect, or separate them and thus to convert the raw material of our sensible impressions into knowledge of objects, which we call experience? With respect to time, therefore, no knowledge within us is antecedent to experience, but all knowledge begins with it.But though all our knowledge begins with experience, is does not follow that it all arises from experience. For it is quite possible that even our empirical knowledge is a compound of that which we perceive through impressions, and of that which our own faculty of knowledge (incited by sense impressions) supplies from itself, a supplement which we do not distinguish from that raw material until long practice and rendered us capable of separating one from the other.It is therefore a question which deserves at least closer investigation and cannot be disposed of at first sight: Whether there is any knowledge independent of all experience and even of all impressions of the senses? Such knowledge is called 'a priori' and is distinguished from empirical knowledge, which has its source 'a posteriori', that is, in experience... "
3 " Authority, reason, experience; on these three, mixed in varying proportions all our knowledge depends. "
― C.S. Lewis , Christian Reflections
4 " But although all our knowledge begins with experience, it does not follow that it arises from experience. "
― Immanuel Kant
5 " But, though all our knowledge begins with experience, it by no means follows that all arises out of experience. "
6 " Humanity cannot lift itself by its own bootstraps; there is no such thing as spontaneous generation; life does not come from crystals; poetry does not come from donkeys; international peace does not come from wars; social justice does not come from selfishness. With all our knowledge of chemistry we cannot make a human life in our laboratories because we lack the unifying, vivifying principal of a soul which comes only from God. Life is not a push from below; it is a gift from above. It is not the result of the necessary ascent of man but the loving descent of God. "
― Fulton J. Sheen , The Prodigal World
7 " I've thought about that often since. I mean, about the word nice. Perhaps I mean good. Of course they mean nothing, when you start to think about them. A good man, one says; a good woman; a nice man, a nice woman. Only in talk of course, these are not words you'd use in a novel. I'd be careful not to use them.Yet of that group, I will say simply, without further analysis, that George was a good person, and that Willi was not. That Maryrose and Jimmy and Ted and Johnnie the pianist were good people, and that Paul and Stanley Lett were not. And furthermore, I'd bet that ten people picked at random off the street to meet them, or invited to sit in that party under the eucalyptus trees that night, would instantly agree with this classification-would, if I used the word good, simply like that, know what I meant.And thinking about this, which I have done so much, I discover that I come around, by a back door, to another of the things that obsess me. I mean, of course, this question of 'personality.' Heaven knows we are never allowed to forget that the 'personality' doesn't exist any more. It's the theme of half the novels written, the theme of the sociologists and all the other -ologists. We're told so often that human personality has disintegrated into nothing under pressure of all our knowledge that I've even been believing it. Yet when I look back to that group under the trees, and re-create them in my memory,suddenly I know it's nonsense. Suppose I were to meet Maryrose now, all these years later,she'd make some gesture, or turn her eyes in such a way, and there she'd be, Maryrose, and indestructible. Or suppose she 'broke down,' or became mad. She would break down into her components, and the gesture, the movement of the eyes would remain, even though some connection had gone. And so all this talk, this antihumanist bullying, about the evaporation of the personality becomes meaningless for me at that point when I manufacture enough emotional energy inside myself to create in memory some human being I've known. I sit down, and remember the smell of the dust and the moonlight, and see Ted handing a glass of wine to George, and George's over-grateful response to the gesture. Or I see, as in a slow-motion film, Maryrose turn her head, with her terrifyingly patient smile... I've written the word film. Yes. The moments I remember all have the absolute assurance of a smile, a look, a gesture, in a painting or a film. Am I saying then that the certainty I'm clinging to belongs to the visual arts, and not to the novel, not to the novel at all, which has been claimed by the disintegration and the collapse? What business has a novelist to cling to the memory of a smile or a look, knowing I so well the complexities behind them? Yet if I did not, I'd never be able to set a word down on paper; just as I used to keep myself from going crazy in this cold northern city by deliberately making myself remember the quality of hot sunlight on my skin.And so I'll write again that George was a good man. "
― Doris Lessing , The Golden Notebook
8 " I shall suggest, on the contrary, that all communication relies, to a noticeable extent on evoking knowledge that we cannot tell, and that all our knowledge of mental processes, like feelings or conscious intellectual activities, is based on a knowledge which we cannot tell. "
9 " It is beyond a doubt that all our knowledge begins with experience. "