The most important quote from Karl Marx:
"It’s possible that I shall make an ass of myself. But in that case one can always get out of it with a little dialectic. I have, of course, so worded my proposition as to be right either way."
15 August 1857, letter to Engels
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Original in German - that "make an ass of myself" isn't a very precise translation, probably "...I'm ridiculing myself" or something like that would be better:
"Es ist möglich, daß ich mich blamiere. Indes ist dann immer mit einiger Dialektik zu helfen. Ich habe natürlich meine Aufstellungen so gehalten, daß ich im umgekehrten Fall auch Recht habe."
>isn't a very precise translation
It comes close enough. Certainly the meaning of "sich blamieren" and "making an ass out of oneself", is very similar.
Maybe "embarrass myself" would be closer...