A good friend told me about a sermon entitled Ten Shekels and a Shirt, preached back in the 60s by a pastor and missionary named Paris Reidhead. I listened to it here and simultaneously read it here. I cannot recommend this sermon too highly and I would put a plug in for listening and reading at the same time - you get so much more out of it, especially as the recording isn't as sharp as modern sermon recordings.
Too often have we traded our gospel heritage, our re-birthright in Christ, the freedom-inducing truth of a loving God, for a mess of humanistic, man-centred pottage. Or as Reidhead would put it, we have traded the glory and worthiness of the holy and loving God for ten shekels and a shirt.
The glory of God, not the happiness of man, is the prime focus of the Christian life and message. And God's gospel and God's glory must be proclaimed by God's methods, not by our methods and through our motivations with a token prayer requesting God's blessing. This is as solid a reminder of that as I've heard in a long time.