For those who teach a lot, a certain amount of burnout can set in, and this can cause them to forget to keep presenting things in a logical, straightforward, complete way, and to do this for meditator after meditator, dharma talk after dharma talk, retreat after retreat, year after year. Imagine making a professor of high-level calculus go back and teach kindergarteners to count—some can do this well, but plenty can't. This is normal human behavior, however disappointing.
