Jeremiah 31:1-6
This chapter is used often. It seems to act as a bridge from the old to the new (see 24C for example). How you view it depends on what you think is being prophesied, an actual messiah, or another hoped for renewal. If refers back to the Exodus with "...who survived the sword found grace in the wilderness;". The dancing with tambourines is found in the Easter Vigil reading Exodus (15:20). They are dancing and singing because God not only parted the Red Sea for them, but then quickly unparted it and drown all the soldiers.
But hey, they got to Israel, where they'll get to plant trees again, right?
Colossians 3:1-4
Bart Ehrmann says this was not written by Paul, but many say it was, probably while he was imprisoned in Rome. It makes a case against some kind of heresy coming out of Colosse. In the first two chapters he explains how Christ and the church are all you need. By this chapter he is laying out the rules. When he says "died", he means you have put your earthly ways behind you and put all your trust, faith, indeed your whole life in Christ's hands. When he says "revealed", that would now be called "The Second Coming", but they didn't use that terminology then. Christ was very much a presence in their lives at the time, and it was just a matter of him being revealed to everyone. Something they expected to happen soon.
Matthew 28:1-10
Finally, for the gospel reading, we have the resurrection. I almost wonder if the all the build up and fanfare is not to mask the simplicity and silliness of the story. If you did not know that this was central to the message of Christianity, if you had just picked up this book, and read the part where the main character suddenly, "met them and said, "Greetings!", would you take it seriously? I hear stories of people picking up a Bible and reading it through and claiming they found this most amazing story in it. The more I study the stories, the more trouble I have believing that happens.
Just the incongruity between the 4 gospels accounts of this same, central, story would be enough to throw you. Side by side comparisons like this are rare, except for secular reviews of the Bible. This Matthew, and the John passage are pretty close, but there are differences. Mark ends with "They said nothing to anyone, because they were afraid." That one is so different, Monks later added 11 more verses to "harmonize" it. In Luke, it is just "women" who discover the tomb, no angels, and they go back and tell Mary and the other Mary. In 1 Corinthians, Paul says,
12 Now if Christ be preached that he rose from the dead, how say some among you that there is no resurrection of the dead?
13 But if there be no resurrection of the dead, then is Christ not risen:
14 And if Christ be not risen, then is our preaching vain, and your faith is also vain.
By dating this writing by Paul near the date of the crucifixion, it is used as evidence of the truth of the resurrection. Never mind that the date of a document is only one minor part of determining if something is true or not. From the work put in to the pageants to the perenial articles in the Sunday paper this time of year, Christianity hinges on this story. Jesus defeated death, and he did it for you. I have nothing else to add.