Complex sentence: Ulrich's thought circles in manifold variations around the ontological difference between non-subsistent being and subsisting beings--he sees the full form, and thus the actual interpretive horizon, of this difference in the personal difference of I and Thou.
Split into simpler sentences: Ulrich's thought circles in manifold variations around the ontological difference between non-subsistent being and subsisting beings. He sees the full form, and thus the actual interpretive horizon, of this difference in the personal difference of I and Thou.