We did not chose our parents, our genes, our childhood environment. God made us what we are. All of our complaints about our natural endowments are a condemnation of God for having made us so. To be required to thank and praise Him for His benefits to us is to be obligated to confess that we must be satisfied with His gifts and that we have no claim on Him for something more. We have no right to compare ourselves with others to despise His goodness either to us or them.
True faith is distinguished by humble thanksgiving.
In particular we should be daily filled with thanksgiving for the great blessing of salvation. To praise Him continually for the blessings He has given us in Christ is only to confess that He is our Creator and Saviour. It is a testimony to the weakness of our faith if our prayers are primarily requests for more blessings, with very little in the way of gratitude expressed. We Christians often act as if we thought the blessing of salvation were a very small gift not deserving of daily thanksgiving. Paul's doxology here reveals the heart of Christian worship.