6. _Catherine’s literary obligations. Her corrections of the Neo-Platonist positions._
We shall trace further on how largely and spontaneously she has, from out of the many different possible types and forms of spirituality, chosen out, assimilated and further explicated certain Platonic and especially certain Neo-Platonic conceptions. We shall be unable to suggest any likely intermediary, or to assume with certainty a direct derivation, for these conceptions from Plato, or indeed from Plotinus or Proclus; and shall nevertheless be obliged to postulate some now untraceable communication, on some most important points, between Plato and herself. Besides this, she derives one Platonic conception from the Book of Wisdom and a corresponding passage in St. Paul; and a certain general Platonic tone and imagery from the Joannine Gospel and First Epistle. Her Neo-Platonism, on the contrary, she derives, massively and all but pure, through two of the Pseudo-Dionysian books and her dearly loved Franciscan Mystic Poet, Jacopone da Todi. It is indeed to the Pauline, Joannine, Dionysian, and Jacopone writings that she owes, with the exception of a certain group of Platonic conceptions, practically all that she did not directly derive from her own psychical and spiritual experiences.
Now her assimilation of this particular strain of doctrine has remained but partial and theoretical with respect to those parts of Dionysian Neo-Platonism which were not borne out by the facts of her own Christian experience; but it has extended even to her emotional attitude and practice, in cases where the doctrine was borne out by these facts.
Thus we shall find that she often speaks theoretically of Evil as simply negative, as the varyingly great absence of Good. Yet, in practice and in her autobiographical picturings, she fights her bad self, to the very last, as a truly positive force. The force of God is everywhere conceived as indefinitely greater, as, indeed, alone infinite; yet the force of Evil is practically experienced and pictured as real and positive also, in its kind and degree.
Again, she often speaks as though her spiritual life had, at some one particular moment, simply arrived at its final culmination, and had attained God and perfection with complete finality,--such, at least, as this particular soul of hers can achieve. Yet, very shortly after, we find her unmistakably in renewed movement and conflict, and observe her mind to be now fully aware of that past “perfection” having been but imperfect, because that act or state is now seen from a height higher than that former level: hence that “perfection” was perfect, at most, in relation to its helps and opportunities in and for its own special moment.