Proclus, The Six Books of Proclus, the Platonic Successor…
“ It is better, however, to hear the Platonic words themselves: “You may say that the sun not only imparts the power of being seen to visible natures, but also that he is the cause of their generation, increase, and nutriment, not being himself generation. Certainly. We may say, therefore, that things which are known, have not only this from the good that they are known, but likewise that their being and essence are thence derived, whilst the good itself is not essence, but beyond essence, transcending it both in dignity and in power.” ”
