The root cause of futile thinking and foolish & darkened hearts? Romans 1:21 says it begins when we
-dismiss Truth instead of remembering that there's One who is good, loves us extravagantly & capably holds all things in His hands;
-forget to acknowledge that God indeed is in control (even in "this");
-choose not to trust Him w/our situations & circumstances.
And what, again, is the end result?
When we take God out of the equation, our THINKING becomes unproductive, useless, hopeless ("futile") and our HEARTS become ill-advised, rash, reckless ("foolish") unable to see & recognize truth & light ("darkened").
So what is the way through?
Acknowledging God - recognizing His place in the situation, elevating Him above the circumstance, remembering He is aware, hasn't been caught off guard, & promises He is working, even in "this" (in other words, "glorifying & thanking Him").
Friends, "don’t worry about anything (an unproductive mind); instead, pray about everything. Tell God what you need, and thank Him for all He has done. Then you will experience God’s peace, which exceeds anything we can understand. His peace will guard your HEARTS AND MINDS as you live in Christ Jesus." - Phil 4:6,7 :)