1915-1987, British Immunologist
Considered in its entirety, psychoanalysis won't do. It's an end product, moreover, like a dinosaur or a zeppelin; no better theory can ever be erected on its ruins, which will remain for ever one of the saddest and strangest of all landmarks in the history of twentieth-century thought.
Sir Peter Medawar – [Psychoanalysis]


If politics is the art of the possible, research is surely the art of the soluble. Both are immensely practical-minded affairs.
Sir Peter Medawar – [Research]


The human mind treats a new idea the way the body treats a strange protein; it rejects it.
Sir Peter Medawar – [Ideas]


Today the world changes so quickly that in growing up we take leave not just of youth but of the world we were young in. Fear and resentment of what is new is really a lament for the memories of our childhood.
Sir Peter Medawar – [Change]