[55] Is [a mind (citta)] that has arisen, arising?
At the moment of dissolution (bhaṅgakkhaṇa), it has arisen, but it is not arising; at the moment of arising (uppādakkhaṇa), it both has arisen and is arising.
Is [a mind] that is arising, arisen?
Yes.
Is [a mind] that has not arisen, not arising?
Yes.
Is [a mind] that is not arising, not arisen?
At the moment of dissolution, it is not arising, but it is not the case that it has not arisen; past and future mind neither is arising nor has arisen.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.