What is the fourth factor in devotion as that path?

  4. Always have a pure and admiring attitude.

The fourth is that we should always have a pure, admiring, and loving attitude towards the guru. We need to do whatever our guru demands and accomplish whatever he wishes. There is nothing that is not included in these two.

Primarily the relationship between the guru and disciple is a dharmic one. If the guru tells you to do something worldly and you do not do it, it is probably okay. But if he teaches you something

dharmic and you actually practice it, then this reinforces the connection between the guru and disciple. 

It is important to actually practice the dharma that the guru teaches.

HH 17th Karmapa
Ogyen Trinley Dorje

From Torch of True Meaning Teaching, Jan 2017