Guru

The Guru is both external and internal. From the exterior he gives a push to the mind to turn it inwards. From the interior he pulls the mind towards the Self and helps in the quietening of the mind. That is Guru's grace. There is no difference between God, Guru and the Self.

The master is within; meditation is meant to remove the ignorant idea that he is only outside. If he is a stranger whom you await, he is bound to disappear also. What is the use of a transient being like that? But so long as you think you are separate or that you are the body, an external master is also necessary and he will appear to have a body. When the wrong identification of oneself with the body ceases, the master will be found to be none other than the Self.

Ramana Maharshi