Porette is usually thought to have great affinities with Meister Eckhart, the true magister of negative theology. Sampling his Latin sermons followed by a few of the German sermons  gives a good sense of his thought. His more  abstract discussions  can be found in his Exegesis of the Gospel of John  (prob. lots of this on the web; I just haven't looked lately)

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John B. Wickstrom
Kalamazoo College
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