A teacher helps us realise when we have a longer way to go.

A thought by Osho --

"There are patterns the seeker gets entangled with. The first thing is: most seekers get lost in an illusory feeling that they have arrived. It is like the kind of illusory feeling that they have arrived. It is like the kind of dream in which you feel that you are awake. You are still dreaming -- your feeling of being awake is part of the dream. The same kind of thing happens to the seeker.

The mind is capable of creating the illusion that "now there is nowhere to go, you have arrived." The mind is a deceiver, and the function of the master for one in this condition is to make him alert that this is not the reality but only a dream [. And] that he has not arrived.

This can happen at many points, again and again. And one can get very irritated and annoyed with the master for the simple reason whenever you feel that you have got it, he simply takes it away and puts you back in your ignorant state."