My wife and I understand how it is. We worked as house-parents at a boys home from 1992-96 where you live with your work 24-7. We once went 7 months with no time off. 7 months 24-7, no down time even at night.
It gave us a crystal clear understanding of Jesus' statement that the sabbath was made for man not man for the sabbath, You need to take time to do nothing related to work on a somewhat regular basis to recharge mentally and physically.
