Jesus taught in Matthew 5:3 (NIV)...“Blessed are the poor in spirit, for theirs is the kingdom of heaven."
All that I have belongs to God.
My body, my mind, and my stuff all belongs to God and He is just letting me manage it all for Him.
In Luke 14:33 (HCSB) Jesus taught...
every one of you who does not say good-bye to all his possessions cannot be My disciple.
Jesus taught that those who belong to Him really do. All their stuff belongs to Him.
On the other hand in James 2:5 (NASB) ...
did not God choose the poor of this world to be rich in faith and heirs of the kingdom which He promised to those who love Him?
Compare James 2:5 with Matthew 5:3 above. Jesus is saying that if all that you have belongs to Him then all that He has belongs to you
"the poor in spirit will inherit the kingdom of heaven".
By faith all of God's resources are available to the poor (and the rich) in accordance with God's wisdom if they surrender all that they have to Him.
Then, they will be rich in faith.