"Is It true that freemasonry only studies the old testament?"
Nope...nor is it claimed.
Masonry pulls from all the books of the bible and some of the apocrypha. The settings are mostly in the old testiment but then the new testiment is
sometimes quoted even in those settings of pagentry.
I might personally argue philisophically it's soul is contained within the book of James. I think one merely needs to rea dthat book and "get it"
to understand 80% of Masonry.
Not to mention the Sheperd of Hermes. Though I doubt but a handful of masons actually read that.

