Sixteen Hearts

There are eight hearts within the Desire Realm:

1 Patience regarding the Dharma involved in Suffering

2 Wisdom regarding the Dharma involved in Suffering

3 Patience regarding the Dharma involving in Accumulation

4 Wisdom regarding the Dharma involved in Accumulation

5 Patience regarding the Dharma involved in Extinction

6 Wisdom regarding the Dharma involved in Extinction

7 Patience regarding the Dharma involved in Way

8 Wisdom regarding the Dharma involved in Way

Note that the Truths of Suffering, Accumulation, Extinction and Way are the Four Noble Truths, which is the fundamental doctrine in Buddhism, particularly Hinayana.

There are the other eight hearts within the Form Realm and the Formless Realm:

1 Subsequent Patience regarding Suffering

2 Subsequent Wisdom regarding Suffering

3 Subsequent Patience regarding Accumulation

4 Subsequent Wisdom regarding Accumulation

5 Subsequent Patience regarding Extinction

6 Subsequent Wisdom regarding Extinction

7 Subsequent Patience regarding Way

8 Subsequent Wisdom regarding Way