Anselm Ideologies

What, exactly, does Saint Anselm mean when he posits that God is, “that, than which no greater can be conceived”

Composing an essay of no less than 750 words—or, roughly, three full pages, double spaced, size 12 Times New Roman font, standard margins— and no more than 1,000 words (roughly four full pages).

Please respond by tracing the line of argumentation Saint Anselm provides to ‘prove’ such a proposition.

One would do well to consider the following: the ‘ontological’ nature of the argument; the ‘logical’ form that the argument takes (namely, reductio ad absurdum); the term God and its corresponding definition; ‘negative theology’; blind faith versus rational faith; the Platonic and Augustinian influence in Saint Anselm’s metaphysics; the notion that God’s essence is His existence