Psalm 40:8-9 8 I delight to do your will, O my God; your law is within my heart.” 9 I have told the glad news of deliverance in the great congregation; see, I have not restrained my lips, as you know, O LORD.

This is a WITNESS psalm…a witness vs evangelical psalm. Witness is always true because it is your (or in this case, the psalmist’s) story. An evangelical proclaims as truth the gospel. Witness proclaims salvation – what Jesus did for me – or in this case, God – as truth and a truth that the witness believes you, too, will realize, is yours, too.