1. Paccaya-pariccheda-nana. ( Knowledge of conditionality )

When the yogi realizes the 1st yana, if he is still observing rupa and nama in the present moment, he will realize there are many rupa and many nama and the observing will not mix the two together, For example, when sitting rupa has pain and he is aware of it, he knows sitting rupa is suffering rupa has pain and he is aware of it, he knows sitting rupa is suffering but doesn't see the suffering as nama-vedana. But now he sees that rupa suffers and nama-vedana knows that rupa suffers. So at this yana , he sees that nama and rupa both exist from cause and each is dependent (paccaya) on the other, For nama to function, it must have a heart base, sense door, and object to know.

Conversely, rupa depends on nama to function -- to walk, move, etc. When the yogi realizes in the present moment that nama and rupa exist from cause, and are dependent on each other, he realizes that rupa and nama aren't created by a god or supernormal power (iddhi)

Nama and rupa in the present are actually created from causes in the past; avijjha (ignorance), tanha (craving) , uppadana (attachment), and Kamma. And they need food to stay alive. When the yogi realizes by wisdom that this is true in the present, he will also realize that this dependence (paccaya) was born this way in the present, (created from causes) he then has no doubt that he was created this way in the past, and will be in the future.

In the Seven Purities, this yana (2nd) is called Kankhavitarana visuddhi, which means "the right view without the defilement of doubt." At this yana the practitioner feels at ease, because he is sure he will be born into a happy state (sugati), if he dies. One who realizes this is called culla sotapanna ("little sotapanna").