"I love the LORD, because he hath heard my voice and my supplications."
This was true for David and especially for Jesus Christ.
This Psalm reminds of so many verses in the New testament...
But people cannot see those things, because they are still enemies of God, they are still proud...
And the LORD would never ever hear me, because I was just a "normal" guy.
By "normal" I mean utterly corrupted, evil, enemy of God, enemy to everything, what is good, loving, wise... and I even didn't know that. I thought that I'm doing just fine, that I am ok, but I wasn't.
Now I can sing this Psalm, because I have heard the Gospel of Jesus Christ.
It had changed my heart and my mind and it is changing me... There is still some evil in me and as long as I am in my body, I can go against Him. But I trust in Him, that He will finish that, what He had started (Php 1:6).
And now, the LORD hears me - but it is not because of me and my "greatness", which is not, but because of Jesus Christ.
So, "therefore will I call upon him as long as I live."
and "Praise ye the LORD." :)