Mindfulness of the five aggregates of clinging, can give insight into non-self, and can break through self delusion, and lead to freedom from suffering
Dhamma teaching is never completed because it has to be right at the right time. It points to something; it never describes or defines. This allows the mind to decompress and get free from the conditioning forces of data and the pressure to make things happen.
When the citta is out of touch with Dhamma, reactive tendencies arise and we start responding to the designating and naming that the mind creates, thereby destroying the freshness of our experience.