2 Chronicles 16:9a (NKJV)
Years ago there was a recruiting poster for the military that had the slogan "I Want You For The US Army". The poster was used to recruit men to join the Army in 1917 and 1918 because the United States had entered World War I. Today all of the branches of the military are volunteer so we don't see recruiting done in the same was as it was back then. But whether it was done through the method of recruitment or just through people volunteering the situation was the same, there was a need that had to be filled. Without people joining the military the military would not be able to do anything.
God does not use recruiting posters but He is looking for people to do the work He wants done in the earth today The Bible tells us that as Christians we are the Body of Christ (1 Corinthians 12:27) and Jesus is the Head (Ephesians 1:22, 23). Naturally speaking, if we want to get anything done it will have to be done through our body. We may have great plans and ideas in our head but if our body does not do anything then our plans and ideas will not be carried out. The same thing is true spiritually; God's plans are carried out through His Body, the Church, that means God wants us to do His will.
Some people think that it is just pastors and other spiritual leaders that God uses to do His will. But we are all a part of the Body of Christ and we all have something we need to do; God has given each of us a gift to use for His glory (1 Peter 4:10), so every part of the Body of Christ is necessary. We need to be involved in what God is doing through our local church and we need to reach out to those around us who do not know Jesus as their Savior. Today God is looking throughout the world for opportunities to show Himself through His people; God wants you to do His will.