The need of Sat Guru

Of course technically I dont have a Guru, but yes I have someone whom I believe in my mind as my Guru and to whom would look myself as a disciple. The thought here is why do we need a Guru? What I feel is we think of Guru as an object, someone who could guide you, show the path of fire and light and who shies you away from the path to perdition. But what happens when your Guru dies? Someday or the other he will have to leave for the holy abode. What does he do then? Cry for him? Who guides his karmas at that point? Who shows him the light? Is it gone?

More to come...