The following link is from Dark Night of the Soul by St. John of the Cross. It’s a little technical, but plow through it slowly. He describes the process of annihilation necessary for union with God. Write down any quotes that strike you and your initial impressions.
This is the link to the first page (Book One, Chapter 8). I’d like you to study chapters 8-12.
http://www.ccel.org/ccel/john_cross/dark_night.vii.viii.html
Spilled Coffee on Ancient Scrolls 