Translation question

A resend, since my last message was dated last year:

Hi Ray --

Sorry to call on your Latin expertise again; as my school's "Latin expert",
I ought to be able to do this on my own, but my high school Latin plus
Cassell's dictionary is failing me.

The math teacher gave the students a cryptogram, which, apparently, they
were able to decipher, but unable to translate (strange, that). He fobbed it
off on me. I have no idea since the grammar, for me, dissolves mid-sentence.
Here's the quote:

"Faber est suae quisque fortunae addius Claudius caecus dictum arcanum est
neutron."

A translation and a demi-parse, please?

One gets the impression this is a famous quote but... What's 'addius'? Why
is Claudius leaping about in the sentence? Is this something Newton said?
Etc, etc, etc...

Thanks for any help you can proffer.

Kou