Certainly you do not want a sacrifice, 

or else I would offer it; you do not desire a burnt sacrifice. 

The sacrifices God desires are a humble spirit

O God, 

a humble 

and repentant 

heart 

you 

will 

not 

reject.

Psalms 51:16-17 NET

David's song isn't about scrapping the sacrificial system that God put in place, but it is about the realisation that his heart was not right with God, and that's the most important thing. 

This version, the NET, uses "humble and repentant" to describe David's desired heart posture towards God. 

It was it seems that David had been the opposite, proud and determined to follow his own course, knowing what God required yet believing he knew better.

And this song is about taking a new course, or perhaps re-finding an old one.  

In re-finding that course, David knows, and reminds us, that we can do that knowing we will not be rejected, that the offering of a humble and repentant heart will always be accepted. 

#psalms

#psalm51

#accepted