Believers are not needed to serve because God lacks anything. He does not. As discussed above, every believer is given a unique gift by the Spirit of God in order to build up and strengthen the body. This begs the question, how important is it for every Christian to use their gifts? Some may feel like their gift is less important than others and that the church does not really need them. This is the very question Paul addresses to the church in Corinth.
In 1 Corinthians 12 he compares the spiritual gifts bestowed by the Holy Spirit to body parts—eyes, hands, head, feet. He says, “The eye cannot say to the hand, ‘I have no need of you,’ nor again the head to the feet, ‘I have no need of you.’ On the contrary, the parts of the body that seem to be weaker are indispensable . . . (1 Corinthians 12:21-22 ESV).” Paul’s point is simple. There are body parts that seem more useful than others because of the amount they are used, but it is foolish to think this way. In fact, the body would cease to function properly without all the body parts playing their role. In the same way, every gift that the Holy Spirit gives is “indispensable”. It is absolutely needed in order for the body, the church, to function properly.
The point is this: the health of the church greatly depends on each believer using their gifts to build itself up. If you are a Christian, your involvement is absolutely necessary for the thriving of the local church. The gifts God has given you are intentional, deliberate, and necessary for the building up of His church. Do not take this lightly, but rather follow the example of Jesus, heed His call to serve, identify the gifts given to you by the Holy Spirit, and begin using them.