What does the Bible say about taking counsel in our own soul?

In Psalm 13, David expresses the deep anguish of taking counsel within himself, leading to feelings of abandonment by God. When we look within ourselves for answers to our problems, we find darkness and despair, reflecting our inherent corruption as noted in Romans 3. The scripture clearly tells us that there is no good thing in us, and when we turn inwardly, we lose sight of God's grace and mercy. Paul also emphasizes in Romans 7 that in our flesh dwells no good thing, indicating our need to rely on God's wisdom rather than our own flawed understanding.