What does Philippians 4:19 mean?

In his conclusion of thanks to his readers, Paul encourages them. Paul was confident that God would meet their needs because they were generous in their giving. This is not a promise of wealth, or even an easy life. Rather, the concept of "need" has to be considered according to God's will. What we "need" and what we "want" are not always the same thing. That being said, God tends to bless those who will use the resources they have according to His purposes. This is something Paul observed specifically happening with the Philippians.

Their needs would be met through Christ, the one who made and controlled all things. They would never lack with Christ as their provider. From the earliest pages of Scripture, God has been known as the Lord who will provide (Genesis 22:14), affirmed by Peter as well (2 Peter 1:11). As Paul noted in 2 Corinthians 9:10, "He who supplies seed to the sower and bread for food will supply and multiply your seed for sowing and increase the harvest of your righteousness."