for our God is a consuming fire

Then I will teach transgressors your ways,
  and sinners will return to you.
Deliver me from bloodguiltiness, O God,
  O God of my salvation,
  and my tongue will sing aloud of your righteousness.
O Lord, open my lips,
  and my mouth will declare your praise.
For you will not delight in sacrifice, or I would give it;
  you will not be pleased with a burnt offering.
The sacrifices of God are a broken spirit;
  a broken and contrite heart, O God, you will not despise.

--Psalm 51:13-17