Lecture I
Kant wanted to drive out of the field the so-called “ontological proof of God”. This ontological proof of God dates from the time of Nominalism, when it was said that nothing general existed which corresponded to general or collective thoughts, as single, specific objects correspond to specific thoughts. The argument says, roughly: If we presuppose God, then He must be an absolutely perfect Being. If He is an absolutely perfect Being, then He must not lack “being”, i.e. existence, for otherwise there would be a still more perfect Being who would possess those attributes one has in mind, and would also exist. Thus one must think that the most perfect Being actually exists. One cannot conceive of God as otherwise than existing, if one thinks of Him as the most perfect Being. That is: out of the concept itself one can deduce that, according to the ontological proof, there must be God.