The Strength of My Heart

Psalms 783:25-28 (NKJKV)
25 Whom have I in heaven but You?
And there is none upon earth that I desire besides You.
26 My flesh and my heart fail;
But God is the strength of my heart and my portion forever.
27 For indeed, those who are far from You shall perish;
You have destroyed all those who desert You for harlotry.
28 But it is good for me to draw near to God;
I have put my trust in the Lord God,
That I may declare all Your works.