648. From this can also be deduced what a belief based on the understanding [alone] is worth, or what preaching is worth, when a person is being carried along by desires, and whether a faith based solely on understanding can save! For in love there is life; in the understanding of such things there is nothing but memory. This was told to souls after death, or spirits, and corroborated in such a way that they admitted they had been completely mistaken during their lifetime, and acknowledged their errors with sadness.