At times we get angry. Perhaps justly so. But remember the advice you give to others. I would tell others to prayerfully process their feelings and even forgive someone who had offended them before confronting them. The same applies in preaching. You read something or hear something. It makes you hot with anger or even rage. It is tempting to unload in the pulpit. People do respond to a fiery preacher with his heart on his sleeve. But be careful.
I just read something that really made me angry. No details here, but it relates to the planned actions of someone vying for a leadership position. I would be tempted to make reference to this in a forthcoming sermon. But if I did so, without first processing it before God, I would be making comments with an edge. I’d be lashing out without preparing my own heart.
It may be appropriate to speak the truth. It may fit with the message and be highly relevant. It may even be my role to represent a biblical perspective on contemporary culture. But it is also my role to represent a biblical perspective in a godly manner. I must spend time prayerfully processing, and even forgiving, before risking a misrepresentation of my righteous, but gracious God.