The Sermon is a Meal

Every sermon, every Sunday school lesson, every small group discussion is the equivalent of a ‘spiritual meal’. There is just as much variety offered to us in ‘spiritual meals’ as there are ‘physical meals’. Some are healthy, some are junky, some will make you fat, some will fuel profound spiritual growth while others will kill you.
When Jesus restored Peter after Peter had denied him three times, Jesus asked him “Simon Son of John, do you love me?” Peter, wounded by the question answered, ‘You know that I love you.” Jesus then gave Peter this command, “Feed my sheep.” (John 21:15-18)
This command to “Feed my sheep”, applies just as much to today’s Jesus loving Pastors as it did to Peter. This command also makes it clear who owns these sheep, it is Jesus who owns them. The church is His flock. Pastors and teachers are charged by Christ to care for and feed HIS sheep.
What do sheep eat? What is the best diet for them? What do they need to stay healthy, grow and stay strong? The answer from scripture couldn’t be clearer. “man does not live on bread alone but on EVERY word that comes from the mouth of the LORD.” (Deut 8:3)
In other words, pastors are given the charge of feeding Christ’s sheep with the words of God; not just some of it, but EVERY word of it. Is it any wonder then why Paul admonished Timothy to “Preach the Word; be prepared in season and out of season; correct, rebuke and encourage — with great patience and careful instruction.” (2Tim. 4:2)
This begs an important question. Is your Pastor feeding you healthy meals or is he feeding you junk food or poison?
Many will immediately respond by saying, “my pastor always preaches from the Bible” or “he has changed my life” or “he does a good job of connecting with me on a personal or entertaining level”. However, neither of these results are useful for discerning whether you’re being fed properly or are suffering from spiritual anemia.

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http://www.extremetheology.com/2006/10/the_sermon_is_a.html