26 For Macedonia and Achaia have been pleased to make a contribution for the poor among the saints in Jerusalem. 27 Yes, they were pleased to do so, and they are indebted to them. For if the Gentiles have shared in their spiritual things, they are indebted to minister to them also in material things. 28 Therefore, when I have finished this, and have put my seal on this fruit of theirs, I will go on by way of you to Spain (Romans 15).
Paul invokes a principal here, connecting spiritual receiving with monetary giving. He did the same thing with the Corinthian church (1 Corinthians 9:14), though for the sake of teaching this principle to them, would not apply it in his own life (but instead made tents for a living, while also preaching and teaching the gospel).
This principle is a good thing to remember every time the devil tries to make those in ministry feel guilty for receiving financial support during days of what seems to be little service. Yet, the reverse is just as true: those in the ministry are debtors to those who give them financial support. They owe them diligent spiritual service—even during those days while keeping their personal business in order.
Lord, thank You for financially taking care of those You call into the ministry through the giving of churches and organizations in which they minister. Help them This Day to be worthy of such support. Amen.