Reason #1: To partner with the missionaries in the work
Under the inspiration of the Holy Spirit, Paul wrote a missionary letter to the Philippian church. In Philippians 4:10-12 he thanks them for their financial support of him and his ministry. He tells them and us that he had learned to be content in any economic state, that he had learned the secret of living on much or little. Then in verse 13 he says, “I can do all things through Him who strengthens me.” When is the last time you thought about this verse in the context of missionary support or lack of economic sustenance?
Reason #2: To partner with missionaries in the challenges of ministry
Paul also mentioned that the Philippians encouraged him by their participation in the ministry in a material way. They shared in his affliction, i.e. as he had financial needs, they made financial sacrifices to help meet those needs, thereby feeling some of his pain.
Nevertheless, you have done well to share with me in my affliction. You yourselves also now, Philippians, that at the first preaching of the gospel, after I left Macedonia, no church shared with me in the matter of giving and receiving but you alone; for even in Thessalonica you sent a gift more than once for my needs.
Reason #3: To partner with the missionaries in the rewards of the work
Paul made it very clear to the Philippians that their financial partnership with his ministry would result in heavenly rewards. The rewards would go the account of the givers. How would you like to be given credit for the fruit of Paul’s ministry. Well, that’s exactly what Paul said in Philippians 4:17, Not that I seek the gift itself, but I seek for the profit which increases to your account.
You see, when you and I give financially to missions, we share in the rewards for that work. Since rewards are given based on our hearts, rewards given at the judgment seat of Christ represent works that glorified God.
Giving to missions glorifies God!