Why is understanding human nature important according to the Bible?

The narrative in Psalm 78 showcases the rebellious nature of man, particularly the Israelites, who, despite being greatly blessed by God, continually turned away from Him. This highlights a crucial theological point: that by nature, all humans are sinful and unthankful. Without recognizing this fallen state, individuals may mistakenly believe they can earn God's favor through good works. Therefore, truly understanding human nature is essential for appreciating the depth of God's mercy and the necessity of His grace for salvation.