chained_bear commented on the word mackerel-snapper I get the fish-eater thing, but I don't know why non-Catholics wouldn't want mackerel--evidenced by the use of the term in a disparaging phrase. (Or wouldn't want snapper, for that matter.)
Psalm 1 is the first of the Psalms in the Hebrew Bible. Like many of the psalms, it contrasts the  righteous  person (tzadik ×¦×××§) to the wicked or ungodly (rasha` ×¨×©×¢) or the  sinner  (chatta' ×××).
time, truth, and hearts is a reference to Psalm 69, verse 13. Psalm 69 is plea for help to God from a repentant sinner. The story arc of Psalm 69 is very similar to the arc of All These Things That I've Done.. One of the claims at the end is that the sinner will praise God in song.