How self-inquiry and surrender lead to final enlightenment is a very tricky topic, since it can be considered from three perspectives, all of which are incomplete. The first perspective is the gradualist perspective, which views the egoic illusion as a set of mental habits. Their eventual thinning out is enlightenment. Then there is the insight perspective, which says that knowledge suddenly destroys all ignorance. Finally, there is the absolute perspective, in which there is no ignorance, egoic illusion, or enlightenment. Self-inquiry and surrender can be viewed from any of these perspectives, and these perspectives themselves link together and go beyond themselves. In the end, considering what enlightenment is is itself a portal hole into something beyond thought.