"A friend told me that you have devoted the contents of a whole booklet against my last book. I will not read it, because I have learnt at the same time that it is insignificant in its criticism, and noteworthy only for the hatred it manifests. I'm rather proud of the hatred that I have inspired in you through the help I have given you. One must have enemies: it keeps you warm. I regret, poor man, that after having held you in some esteem, I now have to despise you to such a degree.” (June 4, 1938).