Karl Popper - The Poverty of Historicism (1957)

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Piecemeal social engineering resembles physical engineering in regarding the ends as beyond the province of technology. (All that technology may say about ends is whether or not they are compatible with each other or realizable.)

Karl Popper

If we are uncritical we shall always find what we want: we shall look for, and find, confirmations, and we shall look away from, and not see, whatever might be dangerous to our pet theories. In this way it is only too easy to obtain what appears to be overwhelming evidence in favor of a theory which, if approached critically, would have been refuted.

Karl Popper

Science is most significant as one of the greatest spiritual adventures that man has yet known.

Karl Popper

The evolution of life on earth, or of human society, is a unique historical process. [From such] a process, we may assume, for example, the laws of mechanics, of chemistry, of heredity and segregation, of natural selection, etc. Its description, however, is not a law but only a singular historical statement.

Karl Popper