When Faults Appear in the Guru’s Actions
Rinpoche advised that when we see mistakes in the virtuous friend, we should abandon that thought like poison.

My very dear one,
It is very important to follow and practice His Holiness the Fifth Dalai Lama’s instructions. Here is his very powerful advice:
In the view of your hallucinated mind,
Your own faults appear in the guru’s actions.
All this shows is that your own heart is rotten to the core.
Recognizing them as your own faults, abandon them as poison.
[We should hold] pure appearance, seeing whatever actions are done by the guru as good and practicing whatever the guru advises. By practicing the profound vital points, whatever is done becomes Dharma. That should be understood as the root of happiness and benefits, and the completion of all our wishes.
The Essence of Nectar says:
Until we are free from our obscuring negative karma,
Even if all the buddhas without exception descended directly in front of us,
We have no fortune to see the sublime holy body adorned with the holy signs and exemplifications;
We only see this present appearance.
This means we see the guru having ordinary appearance, as an ordinary being.
Especially for us, even though we have such enormous heavy negative karma and obscurations, we don't see the guru in the aspect of a dog or donkey, and we see the guru in human form, and we are able to listen to Dharma. It is so wonderful.
The highly attained, learned, great yogi Lodrö Gyaltsen said:
Since our karmic obscurations are so heavy,
We should be happy to see our guru even in human form.
We have great merit not to see him as a dog or a donkey;
Therefore, generate heartfelt devotion and respect, child of Shakya.
Buddha was born in the Shakya caste, and we are disciples of Shakyamuni, so it says “child of Shakya.”