One fascinating time period in the Gospel is the days that elapsed between the resurrection and ascension of Jesus.
Jesus appeared to many and walked with his disciples on multiple occasions.
St. Leo the Great provides a rich meditation on this time span in the Bible in a sermon that is featured in the Church's Office of Readings.
In particular, he singles out various spiritual themes that Jesus may have been trying to highlight.
This time period in the Gospel, while very short, was not without purpose.