And my God will supply every need of yours according to his riches in glory in Christ Jesus. (Philippians 4:19 ESV)
I don't think that this verse quoted in my devotional is quite intended to be a blanket promise to all folks that God will always supply every need we have because of his riches in glory in Christ Jesus. Reading back just a couple of verses from 4:10; the Philippian Church was incredibly generous. They had heard that the Apostle Paul had been in need. They had a concern for him and so they sent some sort of gift to him while he was in Thessalonica. In the early beginnings of Paul's ministry, none of the other churches were meeting his basic needs. So this generous Church sent Paul aid again and again (4:16). He tells them that because of their gift, he was now amply supplied, that it was a fragrant offering, an acceptable sacrifice, pleasing to God. Now, to that Church he says that God will supply every need of their's according to his riches in glory in Christ Jesus.
2 Corinthians 9:8 is another verse that mentions God supplying needs:
2 Corinthians 9:8 And God is able to make all grace abound to you, so that having all sufficiency in all things at all times, you may abound in every good work.
A few verses earlier in 9:6 it says:
2 Corinthians 9:6-7 The point is this: whoever sows sparingly will also reap sparingly, and whoever sows bountifully will also reap bountifully. Each one must give as he has decided in his heart, not reluctantly or under compulsion, for God loves a cheerful giver.
Both contexts promise that God will supply every need of the Christian that is generous. It does not appear that the promise includes the individual who is stingy with their time and their resources. The Apostle Paul was probably one of the most generous Christians to ever walk our planet, yet there were times in his ministry when he was in need (Philippians 4:12 "I know what it is to be in need"). Does that mean that his needs were not met because he lacked generosity? He learned a secret that you and I need to learn, and relearn.
Philippians 4:11b-13 I have learned in whatever situation I am to be content. I know how to be brought low, and I know how to abound. In any and every circumstance, I have learned the secret of facing plenty and hunger, abundance and need. I can do all things through him who strengthens me.
Sometimes we have plenty and sometimes we are in need. Whatever situation we are in, we have to learn to be strengthened by grace through Jesus. Jesus can give contentment and even generosity during our greatest times of need. If we sow sparingly during our times of plenty, we can be sure to reap sparingly in our times of need. But if we are bountifully generous during our times of plenty, we can be assured that in time, God will sufficiently supply every need of ours through Christ's Church. Notice that Paul's needs were met through the Church. If you have no connection to the Church then I am not sure you have a promise from God that he will supply your current or future needs.