The central message of this sermon is that finding contentment and balance in life requires avoiding two extremes: pride or haughtiness, and excessive concern with matters beyond one's control or understanding. The speaker argues that Christians often struggle to find the middle ground between these two errors, which can lead to anxiety, worry, and discontentment. The sermon suggests that this is a fundamental dynamic of life, reflected in various biblical texts, including Psalm 131, which encourages believers to cultivate a spirit of humility, trust, and dependence on God. Ultimately, the takeaway from this sermon is that true contentment and peace are found not by trying to control or understand everything, but by trusting in God's sovereignty and providence, and living in the present moment with a sense of balance and moderation.