 He also presented at some length the Anselmian argument, arguing that existence should be attributed to God, on account of the fact that the very idea of God (that even the insane atheist should have in his mind) obliges us to consider that nothing greater can exist, and that existence in re is obviously a greater thing than existence in the mind. Mersenne, who did not mention Aquinas’s criticisms, found the argument “excellent and very pious” (QG: col 37). He also paid much credit to the Augustinian argument from “eternal truths”—Mathematical truths in particular would not be possible without the supposition of an eternal mind in which they reside: