Even if they are synonyms (which has been gone into great detail below): It is a 3 word quote. Is it really that hard to get it right? Is it really acceptable

Even if they are synonyms (which has been gone into great detail below): It is a 3 word quote. Is it really that hard to get it right? Is it really acceptable to get such a simple quote wrong when writing it down to an audience? If you quote someone and get it slightly wrong then given a few generations of small modification by others getting it slightly wrong and meanings can change drastically.