Check out Pastor Paul McCain's post on Holy Cross Day, if only to view the beautiful painting. He writes:
Today is Holy Cross Day. The day in the church year set aside to reflect and ponder the most essential truth and reality, not just of the Christian faith, which it is of course, but all of life, all things in heaven and on earth, both visible and invisible: the reality of the Most Holy Cross of our Lord and Savior Jesus Christ. Let’s focus our hearts and minds on this day with our reading from 1 Corinthians 1:18-25.