  Recall that Anselm’s intention in the Proslogion was to offer a single argument that would establish not only the existence of God but also the various attributes that Christians believe God possesses. If the argument of chapter 2 proved only the existence of God, leaving the divine attributes to be established piecemeal as in the Monologion, Anselm would consider the Proslogion a failure. But in fact the concept of that than which nothing greater can be thought turns out to be marvelously fertile. God must, for example, be omnipotent. For if he were not, we could conceive of a being greater than he. But God is that than which no greater can be thought, so he must be omnipotent. Similarly, God must be just, self-existent, invulnerable to suffering, merciful, timelessly eternal, non-physical, non-composite, and so forth. For if he lacked any of these qualities, he would be less than the greatest conceivable being, which is impossible. 