(An excert from The Thinklings blog).
The true diagnosis of weak worship is not that our people are coming to get and not to give. Not a few pastors scold their people that the worship services would be lively if people came to give instead of to get.
There is a better diagnosis. People ought to come to corporate worship services to get. They ought to come starved for God. They ought to come saying, "As the deer pants for the water brooks, so my soul pants for You, O God" (Psalm 42:1). God is profoundly honored when people know that they will die of hunger and thirst unless they have God. And it is my job as a preacher to spread a banquet for them. I must show them from Scripture what they are really starving for -- God -- and then feed them well until they say, "Ahhh." That is worship.
-- John Piper, The Dangerous Duty of Delight