What if Amida is not a literal Buddha?

But let’s say he’s not a person. Well then, what is he, if anything?
He’s described as limitless light and life. What else
is described as limitless and eternal? Mind itself. 

Therefore,
even if Amitabha were not real in the person-sense, then
surely “he” is real in the sense of referring to the One Mind,
Being itself, which is always characterized in all spiritual
traditions as eternal, one, and an infinitely bright light (that
doesn’t hurt your eyes). 

So, focusing on Amitabha (reciting the Nembutsu) is focusing
on the foundation of what and who we are. http://www.foryou.sg/qql/slot/u401/ForYouPDF/325P60.pdf 

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NAMU-AMIDA-BUTSU