Thomas Brooks emphasizes that a holy minister's primary aim should be the glory of God, avoiding any display of personal excellence that might overshadow divine glory. He argues for the importance of plainness in preaching, asserting that true power comes from the Spirit rather than human wisdom. Brooks cites Mr. Dod's view that excessive use of Greek and Hebrew in sermons can lead to fleshly ostentation, advocating instead for clear and straightforward doctrine that effectively informs and transforms the heart. He concludes that the most impactful sermons are those that prioritize simplicity and spiritual depth over intellectual complexity.