Is your guru responsible for your enlightenment? If yes and you are not awakened, then he is to be blamed.
If you find freedom, then your guru is again to be blamed because he has been partial to you. If your guru can set you free, then he can do it to the whole world. So your guru is not responsible for your awakening, and yet freedom is next to impossible without having a guru.
So a guru is responsible and yet not responsible. This is a mystery.