Sacchikaranīyā dhammā: 'things to be realized'. Recollection of former states of existence is to be realized through remembrance abhiññā,. The vanishing and reappearing of beings is to be realized through the divine eye abhiññā,. The 8 deliverances vimokkha are to be realized through the mental group kāya here feeling, perception, mental constructions; see: kāya The ceasing of fermentations is to be realized through insight; Vipassana.
Maha Thera Nyanatiloka. Manual of Buddhist Terms and Doctrines, Buddhist Publication Society, first edition 1952.