"Have you ever noticed that the way we sin against people in ministry has a pseudo-confessional quality to it? Harboring bitterness against people is actually confessing their sin to myself, over and over again. Anger is akin to confessing their sin to God, dissatisfied that he hasn't done something and placing myself in his position as judge. Gossip is confessing their sin to someone else." -Instruments in the Redeemer's Hands by Paul David Tripp, page 229.
James 3:10 "Out of the same mouth proceed blessing and cursing. My brethren, these things ought not to be so."
Ephesians 4:31 "Let all bitterness, wrath, anger, clamor, and evil speaking be put away from you, with all malice."