Pray for the Peace of Jerusalem

This is one of the 15 "Psalms of Ascent" – most people hold them to be pilgrim psalms, sung or chanted as pilgrims went up (ascended) to Jerusalem for the three feasts prescribed in the Law (Deut 16.16). It's been noted that there were 15 steps up to the entrance of the Temple in Jerusalem and that some pilgrims would memorize Psalms 120-134 and chant one of these short psalms on each step as they ascended. So, what can we learn from these Psalms of Ascent? Let's look at:
1) A Pilgrim ELATED
2) A Pilgrim FRUSTRATED
3) A Pilgrim ANIMATED