It should be known that the Peri Pascha exists in a fragmented form which is unfortunate because the pieces that we have are very interesting. The Dialogue with Heraclides is wonderful and shows both Origen's skill as a theologian but also his skill as an orator. The section where he prays to be dissolved in Christ is absolutely beautiful.

"For the only way we can accept the command to 'pray constantly'... as referring to a real possiblity is by saying that the entire life of the saint taken as a whole is a single great prayer."

A useful collection of Origen's main works. I found his "Exhortation to Martyrdom" to be very encouraging, especially in the place in my life where I've bought into a more comfortable Christianity. His commentaries on the book of Numbers and Song of Solomon were also fascinating. Although I'm still not sold on interpreting all of the OT allegorically/spiritually, Origen provided some good answers to the questions I've had about that method of interpretation.