In "Doctrinal Discussion" Jason Lindahl writes:

Paul himself set the example by working as a tent-maker and providing for his own needs whenever possible during his missionary journeys. As God's minister, he had the right to earn his living by preaching the gospel, but he wanted to practice the sermon he had preached to the Thessalonians: “If any would not work, neither should he eat” (2 Thess. 3:10). Of course, Paul was willing to receive support and gifts from fellow believers when willingly offered, as he mentioned in Philippians 4:14, 15. (Notice that Paul received this help while laboring at the laziness-plagued Thessalonian church.) Paul went on to thank the Philippians for their most recent gift, which, of course, he was receiving while in prison and unable to work. It is not wrong to graciously accept a gift as a blessing from God when He chooses to send one our way. God has proven over and again that, while He expects us to be diligent in our work, His overflow of blessings to us will far exceed anything that could ever be earned.

Source: Building Christian Relationships: Adult Teacher's Insights, page 26.