The purpose of service is so God can reach others through our hands. In 2nd Corinthians, 9:12-13 the Bible says "For the ministry of this service is not only supplying the needs of the saints but is also overflowing in many thanksgivings to God". By their approval of this service, they will glorify God because of your submission that comes from your confession of the gospel of Christ, and the generosity of your contribution for them and for all others