What should one do to attain nibbana?

Question : Some people ask what they should do to attain nibbana? Answer : At this moment nibbana does not appear. You are seeing or hearing now. When you have penetrated the characteristics of the realities which are appearing now, clinging to these realities can be eliminated. When panna has been developed to the degree that enlightenment can be attained, the citta turns away from conditioned realities which arise and fall away, it has no inclination to experience them; it turns towards the unconditioned reality, to nibbana. At the moment of enlightenment panna is lokuttara panna, supramundane panna.  

Topic 86