A verse loaded with truth! Personally, I wouldn't tell my kids not to be troubled or afraid unless I knew that they'd have good reason to be troubled and afraid. I suspect the same is in operation here! Yet, the verse gives the obedient something to hold on to and, we should.
Also, a note to the socialists and those who would rule, re-distribution and control can't bring the "peace", equality, fairness, blah blah blah, that you hope for. How do I know? "It is written!"
Amen, my brother!