Though I am a positive thinker and believe in the power of watching our thought life, I don't believe positive thinking eliminates all negatives. The bottom line is this: a broken and contrite heart is the entry point of true praise. Seeing all that Jesus did for us includes broken-ness for all that we did to Him. The beginning of the passage included Praises because the temple was completed and dedicated. Christ's work is done but we have a lifetime of working out what He has worked into us.
And that brings me full circle. An old silly phrasing this brought to mind for me is this: "When I get it all together, sometimes I forget where I put it." My life of faith seems to be a continual journey of exploration that rightly returns me to Jesus Christ and His sacrificial work on my behalf. That is the only worthwhile, eternal praising we can do!