How do we know that worldly education can lead to disappointment?

John Newton warns that relying solely on worldly education without seeking God's wisdom can result in perplexity and strife. The reliance on human understanding, detached from divine revelation, can indeed lead to infidelity and skepticism. Newton illustrates this by comparing such knowledge to a 'sword in a madman's hands,' which can create more harm than good. He stresses the importance of a godly education, one that is informed by a relationship with Christ, emphasizing that true wisdom comes from above and is essential for genuine satisfaction in life.