Lots of judgment in this one, but at least it's for the bad guys! Nahum prophecies that Ninevah, the wicked capital city of Assyria will see God's vengeance. This was great comfort to Judah who had been completely ravaged by the Assyrians.

Paul uses Nahum 1:15 in Romans while emphasizing the importance of preaching:

Romans 10:15 (ESV)
And how are they to preach unless they are sent? As it is written, "How beautiful are the feet of those who preach the good news!"

I really liked this verse, though:

Nahum 1:3 (ESV)
The Lord is slow to anger and great in power,
and the Lord will by no means clear the guilty.
His way is in whirlwind and storm,
and the clouds are the dust of his feet.

We forget and underestimate the power and might of God!