Why does someone say there is no God? Why does someone believe they cannot be saved, even though the testimony of the Gospel says otherwise?
Why does someone continue to trust their own strength, even though they have seen themselves fail miserably time after time, and have no hope that that will change? Instead of looking up to God and asking for help, in everything, they resign themselves to failure.
Scarred through and through, they continue to lead a helpless and hopeless life.
I don’t have a PhD in psychology. I don’t even have a Masters of anything. But I’m going to take a stab at the answer with one word, and I am absolutely sure I’m right.