Psalm 23 has a long, rich history in the Christian tradition. Arnobius the Younger wrote this in the Fifth Century: We have in the previous psalm the tribulation of the passion. In this one let us receive the joy of the resurrection. ACCS Others have added that Psalm 24 shows the Messiah in triumph over evil and death.
Reading verse 1 of the Isaiah passage, it is easy to have the same impression, that the psalm and Isaiah are talking about the Messiah resurrected. Lord, you are my God; I will exalt you and praise your name, for in perfect faithfulness you have done wonderful things, things planned long ago. NIV
If we back up and read Psalm 22 and compare it to Isaiah 25:2, we see the crucifixion. But Isaiah does not spend much time on it in this passage for in the next verse we read: Therefore strong peoples will glorify you; cities of ruthless nations will fear you. ESV Most of these nine verses show us the coming Messiah.
Again, we see the Messiah as the protector of the poor and suffering. Isaiah reminds Israel and modern Christians, grafted onto the branch of Israel, that we are to do what the Messiah did (and does).
A close reading of the Bible will confirm that the poor and suffering of the world (at least one-third of the world today) will be seated at the banquet Jesus promised. One of them will be our friend from Haiti. She is perhaps mid-fifties now. She lives in one room, making no more than $2 a day. She took in an abandoned baby a few years ago. And, she gives to the poor.
She is a saint.
Most of us are not that faithful in our walk with the Messiah. Most of us are not as dedicated as Paul. Fix your minds on the things which are holy and right and pure and beautiful and good. Phillips
Do not forget that the Grace of God will cover over all our missteps and procrastinations.
Read my comments on these NT readings here.
Be righteous and do good.