“However, faith in one’s guru does not mean blind faith. It does not mean believing “My guru is perfect,” even though your guru is not perfect. It is not pretending that your guru’s defects are qualities. It is not rationalizing every foible of the guru into a superhuman virtue. After all, most gurus will have defects. You need to recognize them for what they are.” -Khenchen Thrangu Rinpoche
“If the spiritual master is following a wrong path, which is contrary to mainline teachings, the student should be able to take a stand and not blindly follow that path.” -The Dalai Lama