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In order to persevere in the unity of the Church, St. Thomas Aquinas notes that, according to St. Paul, “four virtues must be cultivated, and their four opposite vices shunned” (Commentary on the Letter to the Ephesians §191). What gets in the way of unity? Pride, anger, impatience, and inordinate zeal. According to Aquinas, “the first vice which he [St. Paul] rejects is pride. When one arrogant person decides to rule others, while the other proud individuals do not want to submit, dissension arises in the society and peace disappears. ... Anger is the second vice. For an angry person is inclined to inflict injury, whether verbal or physical, from which disturbances occur. ... The third is impatience. Occasionally, someone who himself is humble and mild, refraining from causing trouble, nevertheless will not endure patiently the real or attempted wrongs done to himself. ... An inordinate zeal is the fourth vice. Inordinately zealous about everything, men will pass judgment on whatever they see, not waiting for the proper time and place; and a turmoil arises in society” (ibid).