'Will of God' in the Bible

Paul, an apostle (special messenger, personally chosen representative) of Christ Jesus (the Messiah) by the will of God, and Timothy our brother,To the church of God which is at Corinth, and to all the saints (God’s people) throughout Achaia (southern Greece):

Not only [did they give materially] as we had hoped, but first they gave themselves to the Lord and to us [as His representatives] by the will of God [disregarding their personal interests and giving as much as they possibly could].