I believe there's no proverb but what is true they are all so many sentences and maxims drawn from experience the universal mother of sciences.
Love and war are the same thing and stratagems and policy are as allowable...
It evolved from my experience in the fifties growing up during the McCarthy...
It is well for people who think to change their minds occasionally in order to keep them clean. For those who do not think it is best at least to rearrange their prejudices once in a while.
