Security of Setbacks—at first reading that is an oxymoron.
Security of Setbacks—at second reading that sounds sick if you buy it.
Or,
Security of Setbacks—we learn to see the the Sovereign hand of God using every setback, large and small, to get our attention to call on His name right away at the first sign of trouble.
It is a fact of human nature in all of history, that we tend to drift away from God when all goes well for us.
And it is all so true that we turn to God more when things do not go well for us.
If we sincerely desire to walk closer with Jesus, to seek Him, He will provide all the necessary setbacks in our life, personally, to accomplish that sweet fellowship that He too desires.
And that, my friend, is divine security through unsolicited setbacks.