You may have learnt something in your mother tongue that is of origin of English language. Like in the case of "fire car", you do not know what it is if you do not know Chinese, because it means "train with locomotive", but Chinese people know this better than the origin of English because when they first get in touch with such things, they do not know there is an original word in English. They think it is something inherent in their cultures.
Now I am doing a translation work, I am given a passage in Chinese which is said to be the words of the greatest scientist Albert Einstein. I know that it must be a translation because this guy is not a Chinese and could not have said the same in Chinese, then how can I translate it back into its original language, which is most probably English? I tried the google and got some finds, but there are so many quotes of this great man, it would take one week at least for me to read and sift them one by one to get my answer, and if it turns out that out of the many quotes I have found there is NOT even the one I look for, then it would be a big waste of my time and efforts, right? So I come here for help, hope you can help me if you happen to know the answer.
I cannot find out the English version of a quote of Albert Einstein, which is to the effect that:
science is not a book that cannot be or will not be finished writing because each great achievement will bring new problems and any development with the elapse of time will have new ideals for us to make breakthrough.
Since he is not a native speaker of English, the quote might be in German in origin, so if nobody can help me find out the English, is it acceptable for me to use my translation instead to be used in a paper?