The Three Kinds of Full Understanding - Full understanding as investigation

Full understanding as investigation (tírana parinna) is panna that

thoroughly investigates nama and rupa, without preference for any particular

nama or rupa, without selection of them. Panna realises the characteristics of

realities as they appear through all six doors and thus it can see them as only

dhammas. When panna clearly realises that all nama and rupa are equal, in

this respect that they are only dhammas, it becomes more accomplished.

Thus it can realise the fourth stage of insight, knowledge of the arising and

falling away of nama and rupa. Full understanding of investigation begins at this stage.