Deuteronomy 8:18

And you shall remember the Lord your God, for it is He who gives you the power to get wealth, that He may establish His covenant which He swore to your fathers, as it is this day.

The blessing of Abraham is ours because we are in the Family and when we are in the Family we have to think of ourselves as heirs.  Heirs to the promise of God for wisdom, blessing and wealth.  An heir has a different kind of thinking and believing because they know they shall receive and have been provided for by their father.  When we became born again, we joined the Family and became heirs because of the covenant that God made.