Science is the century-old endeavour to bring together by means of systematic thought the perceptible phenomena of this world into as thorough-going an association as possible. To put it boldly, it is the attempt at a posterior reconstruction of existence by the process of conceptualization. Science can only ascertain what is, but not what should be, and outside of its domain value judgements of all kinds remain necessary.
Karl PopperNo particular theory may ever be regarded as absolutely certain.... No scientific theory is sacrosanct.
Karl PopperIt is not possible to write clearly enough to avoid being misrepresented by people who are sufficiently determined to do so.
Karl PopperWhile differing widely in the various little bits we know, in our infinite ignorance we are all equal.
Karl PopperI remained a socialist for several years, even after my rejection of Marxism; and if there could be such a thing as socialism combined with individual liberty, I would be a socialist still. For nothing could be better than living a modest, simple, and free life in an egalitarian society.
Karl Popper