When you are established in the ‘I am’ there are no thoughts or words, you are everything and everything is you; later even that goes.
As your ‘Sadhana’ (practice) matures your conviction grows stronger and you get firmly established in the ‘I am’. That is to say you are permanently established in the ‘Turiya’ or the fourth state. In this state there are no thoughts or words, it is the ‘I am’ only everywhere, you are everything and everything is you. When you abide thus, the stage is set for your transcending the ‘I am’. As ultimately that too goes leaving you as the Absolute or ‘Parabrahman’.