The entire process of perception and all activity is based on duality: the subject and the object, the observer and the observed, the doer and the done. It is only after the appearance of 'I am' that all duality and activity began, not before that, so at the root lies the 'I am' that triggered everything. Track down the 'I am' and stay on it, only then will you realize that you are before the 'I am' appeared.