"You must fulfill the vow that I am
not the body but the indwelling principle
‘I am’ only."

In order to understand the true import of whatever
has been said so far you must have the certitude
that I am not the body but the knowledge ‘I am’
only. In order to have this certitude, you have to
meditate on the knowledge ‘I am’ for a reasonable
amount of time. Doing away with the awareness of
the body and getting completely engulfed by the
knowledge ‘I am’ is the first and the last thing to be
done, the only vow to be fulfilled. You can say it is
the practice of being in the ‘Turiya’ or the fourth
state at all times.