Main article: Samudaya
The second noble truth is the truth of the origin of dukkha. Within the context of the four noble truths, the origin (Pali: samudaya) of dukkha is commonly explained as craving (Pali: tanha) conditioned by ignorance (Pali: avijja). This craving runs on three channels:
Craving for sense-pleasures (kama-tanha): this is craving for sense objects which provide pleasant feeling, or craving for sensory pleasures.
Craving to be (bhava-tanha): this is craving to be something, to unite with an experience. This includes craving to be solid and ongoing, to be a being that has a past and a future, and craving to prevail and dominate over others.
Craving not to be (vibhava-tanha): this is craving to not experience the world, and to be nothing; a wish to be separated from painful feelings.