"...Caveat cogitator: the problem of concentration is recursive. Any strategy for sidestepping distraction calls for strategies on sidestepping distraction. When Cassian made one of his simplest recommendations – repeat a psalm over and over, to keep your brain reined in – he knew what he was going to hear next. ‘How can we stay fixated on that verse?’ the monks would ask. Distraction is an old problem, and so is the fantasy that it can be dodged once and for all. There were just as many exciting things to think about 1,600 years ago as there are now. Sometimes it boggled the mind." - Jamie Kreiner

Article: How to Reduce Digital Distractions: Advice from Medieval Monks