But as for me, I am poor and needy; may the Lord think of me.

Psalm 40:1-17

Many, Lord my God, are the wonders you have done, the things you planned for us.
None can compare with you; were I to speak and tell of your deeds, they would be too many to declare.

Sacrifice and offering you did not desire— but my ears you have opened— burnt offerings and sin offerings you did not require.

Then I said, “Here I am, I have come— it is written about me in the scroll. I desire to do your will, my God; your law is within my heart.”

For troubles without number surround me; my sins have overtaken me, and I cannot see. They are more than the hairs of my head, and my heart fails within me.

But as for me, I am poor and needy; may the Lord think of me. You are my help and my deliverer; you are my God, do not delay. The psalmist has openly declared God's marvellous dealings with him. He looks back to the moment of rescue with deep thankfulness, and spells out for others the things he has learned about God. But his troubles are not yet over. He is still conscious of his need. He is still afresh to God for help.

The New Testament sees a deeper significance in this psalm, especially verse 7-8.

Why?

God has done may wonder on me, the things I can't count it.

Yes, no one compares with you, Lord,  there are so many to decalre.

Sacrifice and offering you did not desire, God doesn't like the symbolic matter or ceremony action, God looks into our heart. 

I have to humble before the Lord, for I am a sinner, May the Lord think of me.

How?

Pray to the Lord keep my heart always focusing on Him.