God's promise to meet your needs is v. 19 "And my God will meet all your needs according to His glorious riches in Christ Jesus." 

God says, "I will meet all your needs."  Then why do people have needs?  I see a lot of people who have tremendous needs.  I see a lot of Christians who have tremendous needs.  Why aren't they being met?  Is God a liar?  Is His promise not valid?  God says, I'll meet all your needs, yet I see a lot of needs, even in this church that aren't being met.  What's the problem?

Listen to this episode and understand the context of the promise in Philippians 4:19 .

Philippians 4:10-20