We continue with Why Zen Students Fail!
One reason is because they trust the Zen Teachers too much sometimes.
Another reason is because they trust their Teacher not enough sometimes.
Sometimes they are blind to a Teacher's flaws, victims of excess devotion, faith and obedience (yes, it sometimes happens, as described HERE)

Sometimes students expect a Zen Teacher to be flawless, saintly and superhuman, and run away at the first sign of humanity.
Students should realize that the teachers are really just mentors,
"friends on the way", folks who have been around the block, guides who
have walked the path and can help point out the generally good
directions and the dangers and quicksand. Learn from the voice of
experience and the wise advice, but in the end, each student must do
their own walking.
In all cases, the student should learn to see through the Teacher to the Teaching, seeing this messy world and the Pure Land as One.

Further reading and discussion for this talk are available on the Treeleaf forum:
SIT-A-LONG with Jundo: Why Zen Folks FAIL!! (6) - Trusting the Teacher »