At least four sorts of trouble surface in the Bible. First there is trouble that results from our sin (think 1 Peter 4:14). We will reap suffering if we sow disobedience. Second is trouble that comes from living in a world of sinners; “man is born to trouble as the sparks fly upward” (Job, 5:7; think also about Paul’s comments regarding marriage in 1 Corinthians 7:28). Thistles and cancer and gossip and orthodontist payments grow after Genesis 3. The third is the trouble of spirit that Jesus displayed when He saw pain (John 11:33; 12:27; 13:21). And fourth, there is the trouble Jesus prohibits when He told His disciples not to let their hearts be troubled (John 14:1, 27).
Some trouble is inescapable. Other trouble is disobedient. Note that this is not trouble as a result of being disobedient, but being troubled is being disobedient. A surprising number of times, at least to us natural non-trusters, God directs us not to be troubled, not to be anxious (Philippians 4:6), to put all our cares on Him (1 Peter 5:6-7), even when we’re suffering for righteousness’ sake (1 Peter 3:14).
Why does God require us to believe to the extent of not being upset? He knows how the knotty the wood here can get. He knows that there is a plot twist on the last page, and that He’s only giving us the story one chapter at a time. He knows the pain of searing loss over a loved one. So why does He tell us not to be troubled? Why would He count it sin when we are?
God requires us to trust Him in trouble because He is infinitely trustworthy. He always tells the truth. He always is faithful to do what He said. We can trust in His character and in His promises. When we don’t, we say (in effect) that we know better, that He cannot be depended on. When our hearts are troubled it isn’t that circumstances are so bad that we had to. It’s that we think the circumstances are more unwieldy than God can control. Not only is it wrong, it is a blight on God’s perfect record.