Is it really necessary to serve God? What is the purpose of changing our priorities to accomplish tasks that God could honestly do better and more quickly without us? Peter addresses the importance of serving God in 1 Peter 4:10-11: “Each one should use whatever gift he has received to serve others, faithfully administering God's grace in its various forms. If anyone speaks, he should do it as one speaking the very words of God. If anyone serves, he should do it with the strength God provides, so that in all things God may be praised through Jesus Christ. To him be the glory and the power for ever and ever. Amen.” Peter makes it clear that we have received our gifts from God for two purposes -- to serve others and to bring praise to God. Serving isn’t about us receiving attention or glory; it is for Him to receive glory.
How does God receive glory when we serve? The transforming power of Jesus Christ is on display in the lives of those who have traded selfishness for selflessness. Peter says believers should recognize that we are speaking and serving directly on behalf of God to others, while He gives the ability and strength for us to do so. And when we direct glory towards Him instead of accepting it for ourselves, we stand out from the crowd of those who glorify only themselves. And that difference in our lives causes people to examine the life-changing nature of a relationship with Jesus Christ. It validates our faith in front of others.
-- From www.gotquestions.org