I am wondering if this locution is grammatically valid. I foun it in the following passage:
The Latin "gratia" is related to "gratuitus" which means "not paid for." Consequently, Latin theology literally regards grace in financial terms. (Modern banking still refers to a "grace period.") Understandably, the final judgement is a reckoning of accounts. The issue of free will, "libertas arbitrium," is likewise understood in this context. Libertas is freedom, independence. Arbitrium ...