Psalm 36

This is a song of contrast......
First, David describes the heart and life of the wicked.  
      The NKJV and ESV translate verse one differently.
             ESV reads this way: "Transgression speaks to the wicked deep in his heart."  
             NKJV reads:  "An oracle within my heart concerning the transgression of the wicked."
   
       Either way, the truth is this:  he does not fear God.  Sin runs deep, from the very core of man.  And in the heart of the wicked, it is not quenched.  He has no fear of God.   Recall that fear of Him is a proper awe, wonder and reverence of Him because of  right understanding of Him.  It is a recognition and acknowledgement of total dependence on Him.  The wicked do not know this fear.  Instead, there is no humility in him,  he thinks much of himself. (again, recall that a proper understanding of God puts us in our place with a proper view of ourselves.)    He thinks himself to be an island, independent of any, and with a heart invisible to even God (contrast Psalm 139 where David speaks the truth of God's very knowledge of him).   His speech is unwise and deceitful, and creates trouble.

    He is consumed with the evil in his heart, scheming even on his bed how he might act out this evil.    (Contrast David, and other pslamists who speak of meditating on God's ways, singing joyfully, and are quiet on their beds, pondering God and His word and works. ) see Psalm 63:6,     4:4 ,        149:5.  
The ways of the wicked are trouble, for he does not reject evil.

After describing the wicked,   you would think that he would now describe the righteous;  the upright in heart.   But no.   Instead, he now describes the GOD of the righteous.....citing His attributes.

God's 'steadfast love' ......covenant love for His chosen,   is so deep, vast andgreat that is it compared to the invisible heavens above (where He dwells), the visible heavens (skies), the mountains, and the deep (oceans).   All of these seem so big and powerful to us,  so vast and unmovable.  

So precious is His love!  We, who are so far beneath Him, and so undeserving, take refuge in Him!  He overshadows us, providing safety and refuge, and he feeds us well. For me, this speaks of spiritual feeding.  He refreshes our souls, and provides wisdom unsearchable.

This love is extended to 'those that know Him.....the upright of heart.'  Oh let us not be arrogant like the wicked described above.  Let us not think so highly of ourselves that we are self-sufficient and forget God.
Let our hearts not be frightened by, or overwhelmed by, or overcome by them.  No, indeed, the wicked themselves will be driven away.....and will fall.

David doesn't need to contrast the righteous with the wicked.  For we have our God as our refuge and Strength.  He stands for us.  And those who love Him, will emulate Him.  There-in lies the contrast.