Do I (want to) believe this?

"Is it not from the mouth of the Most High that good and bad come?" (Lamentations 3:38, ESV) The NKJV translates the text as follows: "Is it not from the mouth of the Most High That woe and well-being proceed?" The NIV says, "Is it not from the mouth of the Most High that both calamities and good things come?"

What does this verse mean? Does it mean all bad things, or just certain bad things? What could "from the mouth" mean, but that God is the ultimate cause of all reality?