The document discusses the 60/40 principle, which states that 60% of people are not currently reached by existing religious missions. Of the total population, 7% regularly attend church, 8% attend occasionally, 25% used to attend and are open to returning, 20% used to attend but are not open to returning, and 40% have never attended. The group that attends church is shrinking and aging, while the group that is not reached is growing.