David could be tempted to have unbelief like any of us.  So he made the sacrifice of praise and turned it into the celebration of promise.  His worship invited the answer of God and he was not disappointed.

In thee, O LORD, do I put my trust: let me never be put to confusion.  Deliver me in thy righteousness, and cause me to escape: incline thine ear unto me, and save me.  Be thou my strong habitation, whereunto I may continually resort: thou hast given commandment to save me; for thou art my rock and my fortress.  Deliver me, O my God, out of the hand of the wicked, out of the hand of the unrighteous and cruel man.  For thou art my hope, O Lord GOD: thou art my trust from my youth. Psalm 71: 1-5

David declares his confidence in God against all temptation to confusion.  The Lord is true when the world is totally confused.  Republicans, Democrats, Communists, have all sinned and fall short of God’s glory.  God can speak for himself and guide you to safety.  He is a fortress of safety in a world of dangers.  David asks God for deliverance from violence as he has since his youth.

By thee have I been holden up from the womb: thou art he that took me out of my mother’s bowels: my praise shall be continually of thee.  I am as a wonder unto many; but thou art my strong refuge.  Let my mouth be filled with thy praise and with thy honour all the day.  Cast me not off in the time of old age; forsake me not when my strength faileth.  For mine enemies speak against me; and they that lay wait for my soul take counsel together, Psalm 71: 6-10

David acknowledges that God has taken care of him even before he was old enough to know about that.  To many David seemed amazing, but he points to God for the credit.  He asks God to help him continue with praise so he will not lose his peace when he reaches his old age.  David knows that the dark side waits for us to slip into unbelief or to become ungrateful.

Saying, God hath forsaken him: persecute and take him; for there is none to deliver him.  O God, be not far from me: O my God, make haste for my help.  Let them be confounded and consumed that are adversaries to my soul; let them be covered with reproach and dishonour that seek my hurt.  But I will hope continually, and will yet praise thee more and more.  My mouth shall shew forth thy righteousness and thy salvation all the day; for I know not the numbers thereof. Psalm 71: 11-15

It is interesting how David’s enemies think that God has forsaken him.  They are admitting that there is a God, but they think David may have lost his favor.  They are believers who think they are better than David.  They may be better than the David who was an adulterer and a murderer, but they are not better than the David who repents.  David will praise God because faith preserves him, and God has promised to forgive him.  He can’t keep praise bottled up and walk in faith.

I will go in the strength of the Lord GOD: I will make mention of thy righteousness, even of thine only.  O God, thou hast taught me from my youth: and hitherto have I declared thy wondrous works.  Now also when I am old and greyheaded, O God, forsake me not; until I have shewed thy strength unto this generation, and thy power to every one that is to come.  Thy righteousness also, O God, is very high, who hast done great things: O God, who is like unto thee!  Thou, which hast shewed me great and sore troubles, shalt quicken me again, and shalt bring me up again from the depths of the earth. Psalm 71: 16-20

The strength of the Lord moves in the praise of the unworthy.  The lessons David leaves for youth are to keep faith in the face of our enemies and our own unworthiness.  David asks to live long enough to warn this new generation of their need for God.  God has taken him through trials and will redeem him from the grave.  David understands the resurrection.

Thou shalt increase my greatness, and comfort me on every side.  I will also praise thee with the psaltery, even thy truth, O my God: unto thee will I sing with the harp, O thou Holy One of Israel.  My lips shall greatly rejoice when I sing unto thee; and my soul, which thou hast redeemed.  My tongue also shall talk of thy righteousness all the day long: for they are confounded, for they are brought unto shame, that seek my hurt. Psalm 71: 21-24

David is expecting honor and safety as he praises God.  He will know that this physical comfort will pale beside the joy of worshipping God for the sake of worshipping God.  The praise of God is its own reward while the self-righteous are discovered in spiritual nakedness.

Give the king thy judgments, O God, and thy righteousness unto the king’s son.  He shall judge thy people with righteousness, and thy poor with judgment.  The mountains shall bring peace to the people, and the little hills, by righteousness.  He shall judge the poor of the people, he shall save the children of the needy, and shall break in pieces the oppressor.  They shall fear thee as long as the sun and moon endure, throughout all generations.  Psalm 72:1-5

David looks beyond himself to his son of this new generation.  He asks that this son (Solomon?) will be a great ruler and judge of Israel.  He describes the reign of a righteous king who will be feared by the nations around Israel.

He shall come down like rain upon the mown grass: as showers that water the earth.  In his days shall the righteous flourish; and abundance of peace so long as the moon endureth.  He shall have dominion also from sea to sea, and from the river unto the ends of the earth.  They that dwell in the wilderness shall bow before him; and his enemies shall lick the dust.  The kings of Tarshish and of the isles shall bring presents: the kings of Sheba and Seba shall offer gifts.  Psalm 72:6-10

David prays for a son who will rule to the ends of the earth.  While Solomon was a type of this king, he did not rule the whole earth.  This king receives tribute from more than even the great rule of Solomon.

Yea, all kings shall fall down before him: all nations shall serve him.  For he shall deliver the needy when he crieth; the poor also, and him that hath no helper.  He shall spare the poor and needy, and shall save the souls of the needy.  He shall redeem their soul from deceit and violence: and precious shall their blood be in his sight.  And he shall live, and to him shall be given of the gold of Sheba: prayer also shall be made for him continually; and daily shall he be praised.  Psalm 72:11-15

The king who is honored by all kings has a greater reach for his mercy.  For all nations to serve this king of kings he has to be more than a mortal ruler.  No one can save souls except the agent of God, and this king will be praised like God.  There will be prosperity.

There shall be an handful of corn in the earth upon the top of the mountains; the fruit thereof shall shake like Lebanon: and they of the city shall flourish like grass of the earth.  His name shall endure for ever: his name shall be continued as long as the sun: and men shall be blessed in him: all nations shall call him blessed.  Blessed be the LORD God, the God of Israel, who only doeth wondrous things.  And blessed be his glorious name for ever: and let the whole earth be filled with his glory; Amen, and Amen.  The prayers of David the son of Jesse are ended. Psalm 72:16-20

David’s worship represents the seeds of faith.  The crops, herds, and commerce of the new king will overflow the land.  The fields and cities will prosper.  The name of this king will be eternal and all nations will bless him.  As David releases his praise of God the Lord manifests the prophesy of prosperity through him.  Praise may begin as a sacrifice but it grows into a relationship with God that testifies of his generosity and love.  The joy of praise manifests a relationship with the messiah that is still to come in this prosperous future.  The readers of these Psalms also become part of the celebration.  In this we have the full circle of the trinity.  David initiates prayer, bible study and believer’s fellowship in his Psalm.  Prayer invites God the Father, revelation of messiah welcomes the Son of God, and believer’s participation lets the Holy Spirit flow out to us.