extract courtesy of http://www.nisargadatta.net/
The Sense of "I am" (Consciousness)
When I met my Guru, he told me: "You are not what you take yourself
to be. Find out what you are. Watch the sense 'I am', find your real
Self." I obeyed him, because I trusted him. I did as he told me. All
my spare time I would spend looking at myself in silence. And what a
difference it made, and how soon!
My teacher told me to hold on to the sense 'I am' tenaciously and
not to swerve from it even for a moment. I did my best to follow his
advice and in a comparatively short time I realized within myself
the truth of his teaching. All I did was to remember his teaching,
his face, his words constantly. This brought an end to the mind; in
the stillness of the mind I saw myself as I am -- unbound.
I simply followed (my teacher's) instruction which was to focus the
mind on pure being 'I am', and stay in it. I used to sit for hours
together, with nothing but the 'I am' in my mind and soon peace and
joy and a deep all-embracing love became my normal state. In it all
disappeared -- myself, my Guru, the life I lived, the world around
me. Only peace remained and unfathomable silence.