In these three Psalms, the writer encourages those who seek after God to praise him for his goodness. Psalm 34 is especially rich in David's exaltation in the Lord after God provided a way out of a difficult situation. He called to God and the Lord answered (vs. 6) and the confident declaration "the Lord's angel encamps around those who fear him and delivers them" is a verse to keep close to our hearts whatever trials come.
As David often does in his Psalms, David transitions from speaking about his own circumstances to prophesy about the Messiah. In verse 20, he prophesies "He protects all of his bones, not one of them is broken." Like the Passover lamb whose bones could not be broken (Exodus 12:46,) none of Jesus's bones were broken at the crucifixion as the perfect Passover sacrifice (John 19:36.)
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More on Reading through the Psalms
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Passages from the World Messianic Bible