Nicene and Post-Nicene Fathers, Ser. II, Vol. XI:
The Works of John Cassian.: Chapter XV. Of those who only increase their own or their brother's grievances by hiding them.

Chapter XV.

Of those who only increase their own or their brother’s grievances by hiding them.

On the other hand we know (and O! would that we did not know) some of the brethren who are so hard and obstinate, that when they know that their own feelings are aroused against their brother, or that their brother’s are against them, in order to conceal their vexation of mind, which is caused by indignation at the grievance of one or the other, go apart from those whom they ought to smooth down by humbly making up to them and talking with them; and begin to sing some verses of the Psalms. And these while they fancy that they are softening the bitter thoughts which have arisen in their heart, increase by their insolent conduct what they could have got rid of at once if they had been willing to show more care and humility, for a well-timed expression of regret would cure their own feelings and soften their brother’s heart. For by that plan they nourish and cherish the sin of meanness or rather of pride, instead of stamping out all inducement to quarrelling, and they forget the charge of the Lord which says: “Whosoever is angry with his brother, is in danger of the judgment;” and: “if thou remember that thy brother hath aught against thee, leave there thy gift before the altar, and go thy way, first be reconciled to thy brother, and then come and offer thy gift.” 1988

Footnotes

S. Matt. v. 22-24.