Four intermediary kalpas

The four intermediary kalpas (Wyl. bar bskal nyi shu) are the four periods of a great kalpa:

1. formation (Tib. ཆགས་པའི་བསྐལ་པ་, Wyl. chags pa'i bskal pa),
2. duration (Tib. གནས་པའི་བསྐལ་པ་, Wyl. gnas pa'i bskal pa),
3. destruction (Tib. འཇིག་པའི་བསྐལ་པ་, Wyl. 'jig pa'i bskal pa) and
4. voidness (Tib. སྟོང་པའི་བསྐལ་པ་, Wyl. stong pa'i bskal pa).

Further Reading

• Kangyur Rinpoche, Treasury of Precious Qualities (Boston & London: Shambhala, 2001), 'Appendix I'.
• Patrul Rinpoche, The Words of My Perfect Teacher (Boston: Shambhala, Revised edition, 1998), pages 25-26.