Complex sentence: His vocation as a priest often gives him an insight to the truth, so that justice (but occasionally, not the letter of the law) may be served; also in this regard, obeying the Seal of the Confessional often presents unique circumstances.
Split into simpler sentences: His vocation as a priest often gives him an insight to the truth, so that justice (but occasionally, not the letter of the law) may be served. His commitment to obeying the Seal of the Confessional often presents unique circumstances.