There is a brief section in Learning to Pray by Father James Martin, S.J, dealing with centering prayer. Because I have been doing centering prayer every day for more than 20 years I thought I would be very familiar with whatever Father Martin wrote about centering prayer. Actually reading Father Martin’s remarks turned out to be a special grace for me.
In every philosophy course that I teach at St. John’s University, I start the course by pointing out to the students the distinction between a problem and a mystery as understood by the existentialist personalist philosopher, Gabriel Marcel. According to Marcel there were a number of important differences between a problem and a mystery.