Pergrata §9

⁹ Therefore if prudence and moderation are used, not only will there be no room for suspicion, but that unity of Catholics which We so vehemently desire will be strengthened. If it was more difficult formerly to obtain this unity, the reason was perhaps too many, surely more than was reasonable, tenaciously clung to their opinions and never for any reason retreated from their partisan position. These positions, though they cannot be criticized if kept within bounds, nevertheless greatly impede the attainment of the unanimity so greatly desired.