I'd like to quote several verses from a text used by Lama Zopa Rinpoche to teach guru devotion in his talk on "The Blessings of the Guru" in 1986 in Dharamsala. I find it helpful in countering wrong views regarding the actions of the guru. This is a method practiced by Kagyu lamas, which involves looking at the guru's "mistakes", understanding them and developing guru devotion from them:
"Whatever actions are done by the qualified,
precious guru, all are good;
Whatever actions are done, all are quality.
Even the action of a butcher or killing human
beings is meaningful and good. It is definite that
sentient beings are guided with compassion."
Here, "killing human beings" refers to transferring the consciousness of an evil-doer to a pure realm. This is done by using tantric methods, for eg. during wrathful fire pujas.
"Even the action of degenerating moral conduct is
receiving and increasing qualities. It is showing the
unification of method and wisdom."
Here, "... receiving and increasing qualities" refers to realizations of the tantric path, to cutting off quickly the dualistic view and achieving the Vajradhara state. Or it could be understood as guiding sentient beings by subduing their minds - their disturbing thoughts, attachments etc., and developing their realizations of the path. The "unification of method and wisdom" means "seeing the guru as the same as Vajrabhairava father-mother, Heruka father-mother or Vajradhara father-mother. Looking at the guru's actions in pure form stops any impure appearance; it stops heresy and wrong perceptions, which are great obstacles to the graduated path to enlightenment."
"Even the action of cheating others with lies is
guiding all sentient beings in the path to liberation with
one of the various means of method and wisdom."
Even the action of stealing is a way to transform
others' possessions into merit. It is a method to
pacify the poverty of living beings."
Here, it means that the possessions are used to accumulate merit for those sentient beings and thus guide them.
"Even the action of scolding is wrathful mantra.
It definitely eliminates obstacles.
Even the action of beating is a blessing.
Since it brings all realizations, the devoted are satisfied and joyful.
Even the action of killing a hundred people at one
time is simply the action of Buddha benefiting sentient beings.
Even the action of enjoying a hundred princesses is
the trancendental wisdom of great bliss - mahamudra."
Gyalwa Ensapa said:
"In short, whether great or small realization arises is
due to whether one has meditated with great or small devotion."
H.H. the Dalai Lama says that here, "meditated" means remembering the qualities of the guru, which causes devotion to arise, and remembering his kindness, which causes respect to arise.
To some disciples, the practice of guru devotion is a heart practice and brings quick results.