Anselm's Argument - The Ontological Argument

The advantage of the Anselmian approach is clearly that there might be a path to affirming God's existence a priori. The disadvantage is just your classic criticism, you know, and this was a criticism Aquinas made too. It seems like are we moving just illegitimately from the realm of thought to the realm of reality? So that has been a perennial, persistent criticism of this argument. And this argument is still debated heavily to this very day.