The letter that he reads at the beginning of this sermon, reveals the powerful affect sound biblical preaching has upon those who listen. In this case, the writer of the letter states that his life had become progressively destroyed by hearing his preaching of the Bbile, on a weekly basis.
Platt says in a 2006 Christianity Today article, "I want my preaching to be saturated with the Word of God. We have to know Christ, know him well and know his word."
And that is what a pastor's preaching should be like on a weekly basis, saturated with the Word of God and not with a philosophy that the world seems to want to follow more (Colossians 2:8), no, it should be 100% biblical and it should be in accordance with Scripture for the benefit of the spiritual growth of the congregation (2 Timothy 3:16-17).
I agree with Pastor David Platt concerning the importance that a congregation must know Christ, not just at the surface level, but know Him extemely well, which can only come from the pastor's preaching and the personal study His Word.
The great preacher Charles Spurgeon said, "I believe that those sermons which are fullest of Christ are the most likely to be blessed to the conversion of the hearers," which you will hear the testimony of such a conversion in the beginning of this video.
Christianity Today article about Pastor David Platt (2006) - At 28, Pastor Has Five Degrees and a 4,300-Member Flock